Beam Diagnostics & Coolant Systems Division

Health Physics Unit

 

Introduction

RRCAT houses two electron synchrotron radiation sources (SRS), Indus-1 & Indus-2. Indus-1 is operated at 450 MeV whereas Indus-2 is operated at 2500 MeV. The facility consists of a pre-injector, 20 MeV microtron, a 450 / 550 MeV booster synchrotron and the storage rings (SRS), Indus-1 & Indus-2. The design electron beam current in Indus-1 & Indus-2 are 100 mA & 200 mA respectively. When the electron beam circulates in the storage ring, they undergo centripetal acceleration in the bending regions of the ring and emit synchrotron radiation in a narrow cone, tangential to the electron trajectory. The emitted synchrotron is utilized for various scientific research and various applications. Apart from the synchrotron radiation sources, there are other radiation facilities like Infra Red Free Electron Laser (IRFEL), Industrial LINACS, gamma chamber, X-ray diffraction facilities, Synchrotron radiation beam lines, High power Laser Plasma facilities, Vertical Test Stand (VTS) for testing superconducting RF cavities etc. Additionally, an Agricultural Radiation Processing Facility (ARPF) is being set up near Choithram Mandi, Indore for societal applications. High energy proton accelerator programme aiming for Spallation Neutron Source is also being pursued. A Horizontal Test Stand (HTS) is also being set up for the testing of cryo-modules for use in proposed proton accelerator programme at RRCAT.

Radiation environment

Radiation environment of the synchrotron radiation sources are mainly bremsstrahlung x-rays, produced as a result of the interaction of high energy electrons with structural materials or gas molecules within the vacuum chamber. These x-rays have a continuous spectrum extending up to the energy of the interacting electrons. In Indus-1 the energy of x-rays extends up to 450 MeV whereas in Indus-2 is up to 2500 MeV. As the x-ray energy is high, they generate electro-magnetic cascade in structural materials of the accelerator or in the shielding when they are incident on it. As a result of the cascade generation, the radiation dose may build up in the exposed medium, whether it is a structural material or a human body. Due to the cascade, the radiation field is of mixed nature in which one has photons, electrons, positrons etc. In addition to broad spectrum of x-ray photons, the bremsstrahlung photons are pulsed as electron beam in the accelerators is also pulsed and are highly angular dependent. Due to the interaction of high energy photons, photo-neutron generation is also possible, which contribute to the radiation environment. Synchrotron radiation beam lines in Indus-2 are housed in specially designed shielded hutches, where apart from bremsstrahlung and photo-neutrons, synchrotron radiation, noxious gas ozone etc. are additional radiation hazards. Besides the hazards due to ionizing radiation, non-ionising radiation hazards due to RF & MW, magnetic fields, high voltage etc. are also present.

Research & Development Activities:

Unlike nuclear fuel cycle operations or radiological laboratories, the radiation environment of accelerators in Indus complex is of unique nature due to high energy, pulsed, mixed field and directionality. In order to ensure safety of workers from such radiation environment, substantial amount of R&D activities are carried out at the centre. The important studies among them are listed below:

  1. Response of radiation detectors to high energy and pulsed photon radiation.

  2. Electromagnetic cascade propagation through various media and deduction of shower parameters for 450 MeV & 2500 MeV electron/photon radiation.

  3. Study of RF interference in electronic instruments & radiation detectors

  4. Thick target bremsstrahlung source term determination for 450 MeV to 3 GeV electron.

  5. Optimum target source term determination from 450 MeV to 2.5 GeV electron energy

  6. Thin target source term estimation for Indus-1 & Indus-2

  7. Study of design beam loss vs actual beam loss in Indus-2 and the radiological impact.

  8. Experimental determination of direct & scattered Synchrotron & Bremsstrahlung dose rates in SR beam lines of Indus-2

  9. Gas bremsstrahlung simulation studies and deriving empirical relation for calculation of its dose rate for electron storage rings.

  10. Photo-neutron simulation studies for electron energies 20, 450 and 2500 MeV from tungsten targets.

  11. Radiation dose mapping (for both photons & neutrons) in inaccessible areas & accessible areas using passive dosimeters in collaboration with RPAD, RSSD, BARC.

  12. Development of methodology for SR beams line hutch shielding.

  13. Radiation dose rate assessment for Fault tree analysis of white, monochromatic & windowless beam lines of Indus-2

  14. Study of response of TL materials to synchrotron radiation

  15. Study of ozone production rate, saturation concentration & delay time required for SR beam lines of Indus-2.

  16. Experimental determination of radiation dose due to accidental beam loss in Indus-1 & Indus-2 using indigenously developed small volume ion chamber (17 cc)

  17. Analysis of accidental beam losses in Indus-2.

  18. Deduction of high energy response correction factor for radiation monitors for Indus-1 & Indus-2

  19. Monte Carlo calculations using EGSnrc and FLUKA codes for radiation transport calculations.

  20. Collaboration in the development, testing characterization of radiation detectors for Synchrotron & bremsstrahlung radiation with RSSD, ED, BARC

  21. Radiation shielding calculations for accelerator facilities.

  22. Soil sample analysis studies for Spallation Neutron Source (SNS) site

Routine Jobs

The following routine jobs are executed at the centre:-

  1. Radiation safety surveillance of the SRS facility daily

  2. Radiation dose data retrieval, alarm information etc. from area radiation monitors historical data base, shift wise and its analysis.

  3. Response check of nearly ~100 area radiation monitors & survey instruments.

  4. Personnel radiation dosimetry : TLD to ~ 500 radiation workers on quarterly basis, DRD issue on daily basis

  5. Maintaining dose records

  6. Elementary radiation training to radiation workers/users and conducting radiation protection examination.

  7. Preparation of monthly and quarterly Health Physics reports.

  8. Environmental radiation monitoring in collaboration with EAD, BARC

  9. Induced activity measurements during shut down or whenever required.

  10. Radiation safety surveillance of  other radiation facilities of RRCAT

Human Resource Development (HRD)

  1. RRCAT training school: 30 lectures are delivered every year on Radiation Physics, Health Physics, radiation shielding.

  2. Training, Qualification, Licensing and Qualification for operators of Indus Accelerator Complex

  3. Training / discussion in  Health Physics unit on various Radiation Physics, Health Physics related topics

Emergency Response Centre (ERC)

Emergency Response Centre is kept in a preparedness state for responding to radiological emergencies in public domain. Conducts periodic training, emergency drills to Emergency Response Team members in responding to radiological emergency. Survey instruments, various gadgets, counting set up, spectrometers etc. are kept in a state of readiness.

Publications

In Journals

  1. Response of monitoring instruments to high energy photon radiation ; Haridas.G, Thakkar.K.K, Pradhan.S.D,  Nayak.A.R & Bhagwat.A.M Nuclear Instrumentation and Methods in Physics Research A449, 624-628, (2000)

  2. Study of electromagnetic shower propagation in copper and water at 450 MeV ; Haridas G. Nair, M K Nayak, Vipin Dev, K K Thakkar, P K Sarkar and D N Sharma, Radiation Protection & Environment 28, No.1-4, 53-55 (2005)

  3. Inter-comparison of neutron detectors in pulsed photo-neutron field, Haridas G. Sathian.V, Ponraju.D, M K Nayak, Dhariyawan.M.P, Thakker.K.K, Sarkar.P.K & D NSharma, Radiation Protection & Environment 28, No.1-4, 326-328 (2005)

  4. Study of Ozone gas build up and decay in 750 kV DC accelerator. M K Nayak, Vipin Dev, Haridas G Nair, K K Thakkar, P K Sarkar and D N Sharma. Radiation Protection & Environment 28, (2005)

  5. Radiological status of electron accelerators at CAT, Indore ; Vipin Dev, Dimple Verma, M K Nayak, Haridas G Nair Radiation Protection & Environment 28,   (2005)

  6. Determination of dose build up thickness for absorbed dose measurement in high energy electron photon radiation at electron storage rings, Haridas G. Nair, Vipin Dev, M K Nayak, K K Thakkar, P K Sarkar and D N Sharma Radiation protection dosimetry 121(2) 92-98(2006)

  7. Dose build up correction for radiation monitors in high energy bremsstrahlung photon radiation fields. Haridas G. Nair, M K Nayak, Vipin Dev, K K Thakkar, P K Sarkar and D N Sharma, Radiation protection dosimetry, 118, (3), 233-237 (2006)

  8. Preparation and Characterization of CaF2: Mn Phosphor for High Dose Dosimetry,    Vijay Kumar and A.K. Bakshi, Radiation Protection and Environment Volume30, No. 1-4, 2007

  9. Study on TL and OSL characteristics of indigenously developed  CaF2:Mn  Phosphor, A.K.Bakshi, Vijay Kumar et all, Nuclear Instr. and Methods in Phys.Res.B (2008)

  10. Estimation of bremmstrahlung photon energy in the environment of high-energy electron accelerator using TLD badge. A.K.Bakshi, M.K.Nayak, G.Haridas, S.Chatterjee and R.K.Kher Advance access Published in Radiation Protection Dosimetry, 128(1) 43-48(2008)

  11. Simulation of electron depth dose at 450 MeV and deduction of useful parameters for radiation protection in Indian Synchrotron Radiation Source, Indus-1 Haridas.G. Nair, Mahendra Kumar Nayak, Vipin DeV, Thakar.K.K, Sarkar.P.K, Submitted to Nuclear Instruments & Methods in Physics Research- B (Nov 2009)

  12. Experimental Study of Radiation Environment in the Indus-1 Storage Ring using TLD Badges. M.K.Nayak, G.Haridas, A.K.Bakshi, Dimple Verma, K.K.Thakkar, P.K.Sarkar and D.N.Sharma, Radiation Protection & Environment 31, No.1-4, pp.385-387 (2008)

  13. Simulation of equivalent dose due to accidental electron beam loss in Indus-1 and Indus-2 Synchrotron radiation sources using FLUKA code. P. K. Sahani, G. Haridas, Vipin Dev, K. K. Thakkar, Gurnam Singh, P. K. Sarkar, D. N. Sharma, Radiation Protection & Environment 31, (January-December 2008)

  14. Applications of Radiation Monitoring System at Indus Accelerator Complex. Vipin Dev, P Haridas, A D Kherde, G Haridas, Vimal Bhatnagar, D S Thakur, R K Gupta, P Fatnani , R G Marathe, Radiation Protection & Environment 31, (January-December 2008)

  15. Engineering Design and Development of Shielding Door and Safety Shutter for Transfer Line -3 Tunnel of Indus Accelerator Complex. S.K .Suhane, G.Haridas, M.K Nayak, Dimple Verma, R.S. Banerjee, Sanjay Chouksey, Gurnam Singh. Indian Journal of Pure & Applied Physics Vol. 48, Nov (2010) 794 – 797

  16. Experimental determination of Bremsstrahlung dose rate due to accidental beam loss in Indus-1 storage ring. Haridas.G, Dimple Verma, P.K.Sahani, Nayak M.K, K.K.Thakkar & Sarkar P.K, Indian Journal of Pure & Applied Physics Vol. 50, July (2012) 462 - 464

  17. Bremsstrahlung source term determination for 450 MeV electrons. M K Nayak, G Haridas, T K Sahu, S Dashora, R V Nandedkar and P K Sarkar, Indian Journal of Pure & Applied Physics Vol. 50, July (2012) 494 - 497

  18. Photon and Neutron Dose evaluation in experimental of Indus‐1 Synchrotron Radiation Source. Dimple Verma, T K Sahu, Mukesh Khare, S Dashora, Saleem Khan, M K Nayak, P K Sahani, G. Haridas & P K Sarkar, Indian Journal of Pure and Applied Physics, Volume 50, July 2012, pp. 505-508

  19. Radiation Safety during the Commissioning trials of Synchrotron Radiation Beamlines of Indus-2. Vipin Dev, M.K.Nayak, P.K.Sahani, Dimple Verma, Mukesh Khare, Vijay Kumar, Saleem Khan, T.K.Sahu, S.Dashora, Debasis Sinhamahapatra, Haridas G, A K Bakshi, A K Mahant, R.G.Marathe, Gurnam Singh and P K Sarkar, Indian Journal of Pure & Applied Physics Vol. 50, Nov (2012) 808 – 810

  20. Experimental investigation of synchrotron and bremsstrahlung dose at lithography beam line of Indus-2 SRS. M K Nayak, P K Sahani, Mukesh Khare, T K Sahu, P Haridas, Vipin Dev, S Dashora, Vishal Dhamgaye, G.Haridas and P K Sarkar, Indian Journal of Pure & Applied Physics, Vol. 50, Nov (2012) 829 – 831

  21. Residual Radioactivity Measurements at Indus Accelerator Complex. Dimple Verma, M.K.Nayak, P.K.Sahani, Vijay Kumar, Vipin Dev, T.K.Sahu, S. Dashora,M.Khare, D.S.Mahapatra, G.Haridas and P.K.Sarkar, Indian Journal of Pure and Applied Physics, Volume 50, Nov 2012, pp. 825 - 828

  22. Evaluation of ozone concentration for a white beam line hutch at Indus‐2 Synchrotron Radiation Source. Saleem Khan, M K Nayak, G. Haridas and P K Sarkar, Indian Journal of Pure and Applied Physics, Volume 50, Nov 2012, pp. 840 - 842

  23. Simulation of absorbed dose rate due to synchrotron radiation and shielding thickness for radiation safety at Indus-2 using FLUKA. P. K. Sahani, G Haridas and P. K. Sarkar, Indian Journal of Pure and Applied Physics, Volume 50, Nov 2012, pp.818-820

  24. Assessment of neutron dose in Indus accelerator complex using CR‑39 SSNTD. Dimple Verma, G. Haridas, Rupali Pal, Vipin Dev, Tapas Bandopadhyay, M. P. Chougaonkar, R. M. Tripathi, D. A. R. Babu, Radiation Protection & Environment 31, January-December 2008,

  25. Radiation safety Aspects of the operation of first three synchrotron beam lines on Indus-2. M.K.Nayak, Haridas G. Nair, A. K. Bakshi, P. K. Sahani, Sunil Singh, Saleem Khan, Dimple Verma, Vipin Dev, T. K. Sahu, Mukesh Khare, Vijay Kumar, Tapas Bandyopadhyay, R. M. Tripathi and D. N. Sharma, Radiation Protection Dosimetry, Oxford Publications, UK, advance access published, (2014) pp 1 -7, doi:10.1093/rpd/ncu273

  26. Bremsstrahlung Photon Dose Measurement inside Indus-2 synchrotron radiation source ring area. Saleem Khan, T.K. Sahu, V. Kumar, G. Haridas, Published in Radiation Protection and Environment, Vol.38 (Oct-Dec 2015), pp 127-129.

  27. Bremsstrahlung source term estimation for high energy electron accelerators. M.K.Nayak, T.K.Sahu, H.G.Nair, R.V.Nandedkar, Tapas Bandyopadhyay, R.M Tripathi, P.R.Hannurkar & D.N.Sharma, Radiation Physics and Chemistry113 (2015) 1–5

  28. Gas bremsstrahlung studies for medium energy electron storage rings using FLUKA Monte Carlo code. Prasanta Kumar Sahani, Haridas G., Anil K. Sinha & P.R. Hannurkar, Radiation Physics and Chemistry 119 (2016) 51–54

  29. Optimum target source term estimation for high energy electron accelerators. M.K. Nayak, T.K. Sahu, Haridas.G, R.V. Nandedkar, Tapas Bandyopadhyay, R.M Tripathi & P.R.Hannurkar, Radiation Physics and Chemistry, Elsevier publication, 122 (2016) 77-81

In Conferences

  1. RF and Microwave radiation safety at CAT, Indore ; M K Nayak, Haridas G Nair, Vipin Dev, K K Thakkar, P K Sarkar and D N Sharma in Proc. of Indian Particle Accelerator Conference (2005)

  2. Experiment for dose measurement during beam killing at Indus-1 Synchrotron Radiation Source ; M K Nayak, Vipin Dev, G Haridas, K K Thakkar, P K Sarkar and D N Sharma, In proc. of Indian Particle Accelerator Conference, 393-394 (2006).

  3. Preliminary results on the estimation of photon energy and dose using TLD in Indus-1 Experimental Hall ;. A.K.Bakshi, M.K.Nayak, G.Haridas and R.K.Kher, In proc. of Indian Particle Accelerator Conference, 395-396 (2006).

  4. Experimental Study on response of Scintillation Detectors for Radiation Monitoring in Storage rings. G.Haridas, M.K.Nayak, K.K.Thaakkar, P.K.Sarkar, D.N.Sharma , In proc. of Indian Particle Accelerator Conference, 387-388 (2006).

  5. Radiation safety considerations of the operation of Indus-1 Synchrotron Radiation Source Haridas Nair, Vipin Dev, Mahendra Nayak, Kapil Kumar Thakkar, Dimple Verma, Deva Nand Sharma, Pradeep Kumar Sarkar Presented in  Asian Particle Accelerator Conference (APAC-2007), 29 Jan – 2 Feb 2007, RRCAT, India.

  6. Beam Loss Detection Technique Using Radiation Detectors in Electron Accelerators at RRCAT, Indore. M K Nayak, G. Haridas, Vijay Kumar, P K Sahani, KK Thakkar, PK Sarkar and DN Sharma, Conference on Accelerator and Low Level radiation safety, IUAC, Delhi, (2007)

  7. Bremsstrahlung Contribution around X-Ray Diffraction Beam line at  Indus-2 Synchrotron Radiation Source. M.K.Nayak, Vipin Dev, G.Haridas, Dimple Verma, K.K.Thakkar, P.K.Sarkar and  D.N.Sharma, Conference on Accelerator and Low Level radiation safety, IUAC Delhi (2007)

  8. Radiation Energy Estimation During Ti-Sapphire Laser Plasma Experiments At RRCAT, Indore. M.K. Nayak, Dimple Verma, Vipin Dev, Vijay Kumar, P.K.Sahani, G.Haridas, K.K.Thakkar, Munish Kumar, L.C.Prasad, P.K.Sarkar And D.N.Sharma. National Symposium on Radiation Physics-17 (2007)

  9. Effect of storage ring shutdown on radiation level around Indus-1 synchrotron radiation source. Vipin Dev, M. K. Nayak, Vijay Kumar, P K Sahani, Dimple Verma, G. Haridas, K K Thakkar, P K Sarkar and D N Sharma, National Symposium on Radiation Physics-17, November, 2007

  10. Radiological status during Indus-2 SRS commissioning, Dimple Verma, M.K. Nayak, Vipin Dev, Vijay Kumar, P.K.Sahani, G.Haridas, K.K.Thakkar, P.K.Sarkar and D.N.Sharma, National Symposium on Radiation Physics-17( 2007)

  11. Electron depth dose - A tool for radiation safety programme in high energy electron accelerators. Haridas.G, Nayak.M.K, Vipin DeV, Thakkar.K.K, Sarkar.P.K and Sharma.D.N, National Symposium on Radiation Physics-17, (2007)

  12. Response of Neutron Dosimeters to Pulsed Neutron Fields in High Energy Electron Accelerators at Indus Complex, RRCAT, Dimple Verma, M.K.Nayak, Vipin Dev, P.K.Sahani, Vijay Kumar, Haridas G., K.K.Thakkar, Kohlekar R.,     P.K.Sarkar, D.N.Sharma, Rupali R., Jayalakshmi V., G. Chourasia, S.G. Vaijapurkar,­ National Conference on  Indian Association of Radiation Protection, Defence Lab, Jodhpur (2008)

  13. Simulation of equivalent dose due to accidental electron beam loss in Indus-1 and Indus-2 Synchrotron radiation   sources using FLUKA code, P. K. Sahani, G. Haridas, Vipin Dev, K. K. Thakkar, Gurnam Singh,      P. K. Sarkar, D. N. Sharma National Conference on  Indian Association of Radiation Protection, Defence Lab, Jodhpur (2008)

  14. Applications of Radiation Monitoring System at Indus Accelerator Complex, Vipin Dev, P Haridas, A D Kherde, G Haridas, Vimal Bhatnagar, D S Thakur, R K Gupta, P Fatnani , R G Marathe National Conference on  Indian  Association of Radiation Protection,

  15. Experimental Evaluation of the Radiological Condition of HRVUV Beam Line of Indus-1 SRS at RRCAT. Dimple Verma, M.K.Nayak, Vipin Dev, P.K.Sahani, G. Haridas Nair, K.K.Thakkar, S. Chouksey, G. Singh, P.K.Sarkar and D.N.Sharma, Indian Particle Accelerator Conference, RRCAT, Indore (2009).

  16. Simulation of electron, positron and bremsstrahlung spectrum generated due to electromagnetic cascade by 2.5GeV electron hitting lead target using FLUKA code. P. K. Sahani, G. Haridas, Vipin Dev, K. K. Thakkar, Gurnam Singh, P. K. Sarkar and D. N. Sharma, Indian Particle Accelerator Conference, RRCAT, Indore (2009).

  17. Experimental determination of beam loss point in Transport Line-2 of Indus Accelerator Complex.  M.K.Nayak, Vipin Dev, P.K.Sahani, Dimple Verma, G.Haridas, K.K.Thakkar, P.K.Sarkar, Gurnam Singh and D.N.Sharma, Indian Particle Accelerator Conference, RRCAT, Indore (2009).

  18. . Radiation Detectors used at Electron Accelerators at RRCAT, Vipin Dev, M. K. Nayak, Dimple Verma, G. Haridas, K K Thakkar, P. Haridas, Mukesh Khare, R K Gupta, R G Marathe, Gurnam Singh, National Conference on Accelerator and Low Level Radiation Safety, IUAC, New Delhi (2009)

  19. Estimation of Induced Radioactivity at Indus Accelerator Complex, Dimple Verma, M.K.Nayak, P.K.Sahani, Vijay Kumar, Vipin Dev, G.Haridas, K.K.Thakkar S.Chouksey and P.K.Sarkar, National Conference on Accelerator and Low Level Radiation Safety, IUAC, New Delhi (2009)

  20. Radiological Status of Ti-Sapphire Laser Plasma Chamber at RRCAT, Indore, M.K. Nayak, Dimple Verma, Vipin Dev, G.Haridas, K.K.Thakkar, D.N.Sharma and P.K.Sarkar , National Conference on Accelerator and Low Level Radiation Safety, IUAC, New Delhi (2009)

  21. Engineering Design and Development of Shielding Door and Safety Shutter for Transfer Line -3 Tunnel of Indus Accelerator Complex, S.K .Suhane, G.Haridas, M.K Nayak, Dimple Verma, R.S. Banerjee, Sanjay Chouksey, Gurnam Singh, National Conference on Accelerator and Low Level Radiation Safety, IUAC, New Delhi (2009)

  22. Study of bremsstrahlung spectra by varying incident electron energy, target and target thickness using FLUKA code, P. K. Sahani, P. K. Sarkar and Gurnam Singh, National Conference on Accelerator and Low Level Radiation Safety, IUAC, New Delhi (2009)

  23. Experimental determination of Bremsstrahlung and Synchrotron radiation dose at SR beam lines of 2.5 GeV Indus-2 SRS, Haridas.G National Symposium on Radiation Physics-18, M.S University Udaipur( 2009)

  24. Radiological physics studies at front ends of Indus beam lines. Haridas G. Nair, Nayak M.K., Dev Vipin, Sahani P.K., Kumar Vijay, Verma Dimple, Thakkar K.K., Sarkar P.K. and Sharma D.N. Abstract, Radiation Safety of Synchrotron Radiation sources (RADSYNCH-09) held at Elettra, Italy on May 2009.

  25. Calculation of ozone production rate for Indus-2 Synchrotron Radiation beam lines. M K Nayak, Saleem Khan, Haridas G and P K Sarkar, International Symposium on Accelerator and Radiation Physics, ISARP-2011, 16-18 Feb, SINP, Kolkata

  26. Radiological Safety Issues at the Synchrotron Radiation Sources Indus-1 & Indus-2. Haridas.G & P.K.Sarkar, International Symposium on Accelerator and Radiation Physics, ISARP-2011, 16-18 Feb, SINP, Kolkata

  27. Integrated photon dose mapping in Indus-1 Experimental Hall using ionization chamber based survey meter. Vipin Dev, S K Mishra, T K Sahu, Haridas G, K K Thakkar, Gurnam Singh and P K Sarkar, International Symposium on Accelerator and Radiation Physics, ISARP-2011, 16-18 Feb, SINP, Kolkata

  28. Simulation of photo neutron spectra due to incident high energy electrons on tungsten target using FLUKA. P. K. Sahani, G Haridas and P. K. Sarkar, Presented at CARS-2011, 16-18 November, BARC Mumbai

  29. Determination of bremsstrahlung efficiency for 450MeV electrons, M.K.Nayak, T.K.Sahu, G.Haridas, Tapas Bandyopadhyay, R.M.Tripathi and D.N.Sharma, Indian Particle Accelerator Conference, InPAC-2013-ID-311, 19-22 November, VECC, Kolkata

  30. Radiation shielding evaluation for 35 MeV IR FEL LINAC. M.K.Nayak, Saleem Khan, G.Haridas, D.S.Joshi, Sanjay Chouksey, Tapas Bandyopadhyay, R.M.Tripathi and D.N.Sharma, Indian Particle Accelerator Conference, InPAC-2013-ID-315, 19-22 November, VECC, Kolkata

  31. Evaluation of Radiological Conditions in the Experimental Hutch of SEXAFS Beam Line of Indus-2 due to Introduction of a Photon Beam Shutter. P K Sahani, M.K.Nayak, Haridas G, Tapas Bandyopadhyay and P R Hannurkar, Indian Particle Accelerator Conference, InPAC-2013-ID-317, 19-22 November, VECC, Kolkata

  32. Radiation Protection in accelerator facilities – Challenges. Haridas.G, Tapas Bandyopadhyay, R.M.Tripathi & D.N.Sharma, In proceedings of International Conference on Occupational Radiation Protection: Enhancing the Protection of Workers —Gaps, Challenges and Developments at IAEA Vienna during 1-5 Dec 2014

  33. Ambient Radiation level and air borne activity at RRCAT, Indore. Vijay Kumar, Mukesh Khare, T K Sahu, G.Haridas, K.S.Pradeepkumar, Nineteenth National Symposium on Environment (NSE19), December 11-13, 2014, Mahatama Gandhi University, Kottayam, Kerala.

  34. Radiation safety studies at synchrotron radiation beam lines of Indus-2. P K Sahani, Haridas G, A. K. Sinha, Tapas Bandyopadhyay and P R Hannurkar. Accepted for publication in proceedings of International Conference on Radiation Safety of Synchrotron Radiation Sources (Radsynch-2015), Hamburg, Germany

  35. Radiation dose due to accidental beam loss of stored beam in Indus-2 Storage Ring. T K Sahu, Vijay Kumar, Dilip Kumar Gupta, Haridas G, Tapas Bandyopadhyay, P.R.Hannurkar, Accepted for publication in proceedings of International Conference on Radiation Safety of Synchrotron Radiation Sources (Radsynch-2015), Hamburg, Germany

  36. RF & MW Radiation Hazards, Safety and Measurements at RRCAT, Indore. M.K.Nayak, Haridas.G, Nitish Tiwari, Tapas Bandyopadhyay, Mahendra Lad, T.A.Puntambekar & R.M.Tripathi, 32nd DAE occupational professional safety meet at 5-7 Oct 2015, RRCAT, Indore

  37. Ozone generation in synchrotron radiation beamlines of Indus-2 and its safety measures. Saleem Khan, Vijay Kumar, Haridas.G, A.K.Sinha &T.A.Puntambekar, 32nd DAE occupational professional safety meet at 5-7 Oct 2015, RRCAT, Indore

  38. Bremsstrahlung source term for thin, optimum and thick target for 450 MeV electrons, M.K.Nayak, T.K. Sahu, Haridas.G, Tapas Bandyopadhyay & R.M. Tripathi, NSRP-20 at Mangalore University, Mangalore during 28-30, Oct 2015

  39. Design and Optimization of gas bremsstrahlung stop for insertion device beamline on Indus-2. P. K. Sahani, Asim Kumar Das, Haridas G, A. K. Sinha, B. N. Rajasekhar, T. A. Puntambekar, and N.K.Sahoo, NSRP-20 at Mangalore University, Mangalore during 28-30, Oct 2015

  40. Measurement of ozone concentration and estimation of delay time at imaging beamline (BL-4) of Indus-2 Synchrotron Radiation Source. Vijay Kumar, Saleem Khan, T.K. Sahu, Balwant Singh, Haridas.G & T.A.Puntambekar, Indian Particle Accelerator Conference 2015, 21-24 December, TIFR Mumbai

  41. Dose profile measurement in the Indus-2 ring tunnel using thermoluminescent dosimeters, Dilip Kumar Gupta, Dimple Verma, T.K. Sahu1, Haridas.G, Tapas Bandyopadhyay, R.M.Tripathi & T.A.Puntambekar, Indian Particle Accelerator Conference 2015, 21-24 December, TIFR Mumbai

  42. Radiation shielding evaluation of Vertical Test Stand facility. P. K. Sahani, Haridas G., Hemant Kumar Patel, P.K.Kush, S.C.Joshi & T. A. Puntambekar, Indian Particle Accelerator Conference 2015, 21-24 December, TIFR Mumbai

  43. Feasibility studies on the use of thin window GM tube for low energy X-ray detection in synchrotron radiation beam lines of Indus-2. Dilip Kumar Gupta, Vipin Dev , T.K. Sahu , M.K. Nayak, Haridas.G , Tapas Bandyopadhyay, R.M.Tripathi, 32nd IARP conference, IARPIC-2016, 22-25 Feb, 2016, Anupuram, Tamilnadu, India

  44. Development of a proto-type multi-cavity ion chamber for depth dose measurement in high energy electron accelerator environments. M.K.Nayak, T.K.Sahu, Haridas.G R.V.Nandedkar, Tapas Bandyopadhyay & R.M. Tripathi, 32nd IARP conference, IARPIC-2016, 22-25 Feb, 2016, Anupuram, Tamilnadu, India

  45. Radiological experiences during the commissioning and operation of Indus-2 synchrotron radiation source Haridas.G, M.K.Nayak, P.K.Sahani, Vijay Kumar, Saleem Khan, Dimple Verma, T.K.Sahu, Vipin Dev, Mukesh Khare, D. K.Gupta, J .T. K Mukherjee, S.P.Tripathy, D.S.Thakur, Ram Bahadur, R.G.Marathe, T. Bandyopadhyay, T.A.Puntambekar A.C.Thakurta & R.M.Tripathi, InPAC-2018, 9-12, Jan. 2018

  46. Probabilistic safety analysis of radiation safety systems for industrial electron accelerator, Priyangshu Dhara, Gopika Vinod, Haridas G, Ajay Kumar, M.K Nayak, InPAC-2018, 9-12, Jan. 2018

  47. Dose assessment on temperature monitoring units in Indus-2 tunnel, Dilip Kumar Gupta, T K Sahu, N.J.Bange, Haridas G, T. Bandyopadhyay, InPAC-2018, 9-12, Jan. 2018

  48. Investigation and mitigation of elevated radiation level at equipment gallery of Indus-2, RRCAT Dimple Verma, Dilip Gupta, Vipin Dev, T K Sahu, P K Sahani, Saleem Khan, M.K. Nayak, Vijay Kumar, Mukesh Khare, Haridas G, T.A.Puntambekar, Tapas Bandopadhyay, R.M.Tripathi, InPAC-2018, 9-12, Jan. 2018

  49. Effect of residual gas molecules on gas bremsstrahlung dose rate in Indus-2, P. K. Sahani , T. A. Puntambekar, Haridas G., A. K. Sinha, K.V.A.N.P.S. Kumar, InPAC-2018, 9-12, Jan. 2018

  50. Effect on CaSO4:Dy TL material on exposure to high dose, P. K. Sahani, Haridas G, A. K. Sinha and T. A. Puntambekar, IARPIC-2018, 16-20 January, 2018.

  51. Radiation shielding evaluation for new injector microtron at Indus facility, M K Nayak, Dilip K Gupta, Haridas. G, Tapas Bandyopadhyay, T A Puntambekar and R.M.Tripathi, IARPIC-2018, 16-20 January, 2018.

Internal Reports

  1. Shielding Evaluation of the upgraded version of Indus-2, Synchrotron Radiation Facility at Cat, Indore, A.R.Nayak, Haridas. G, K.K.Thakkar, D.N.Sharma, BARC, (2003)

  2. Catalogue of radiation generating facilities at CAT Indore, HPU, RRCAT, (2003)

  3. Photon spectrum measurements at Indus-1 Synchrotron Radiation Source Facility, CAT, Indore, , Haridas.G,  Krishnamachari.G, Anilkumar.S, Kale.M.S, Nayak.M.K, Thaker.K.K, Nayak.A,  Sharma.D.N and Abani.M.C, BARC Report, BARC/2003/I/001 (2003)

  4. Comparative study of radiation instrumentation used in electron accelerator at CAT, Indore, Dimple Verma, CAT/2005-18, (2005)

  5. Experiment to determine Bremsstrahlung component in synchrotron radiation at XRD beam line 12, Indus-2 experimental hall, G.Haridas, M.K.Nayak, Dimple Verma, Vipin Dev,  RRCAT/AP/HPU/2006/399 (2006)

  6. Development of prototype ambient synchrotron radiation monitors fot Indus-2 SRS  Beam lines, Vipin dev,  P.Haridas, Azakuvelvan, R.K.Gupta, M.K.Nayak, Dimple Verma, P K Sahani, Vijay Kumar, K.K.Thakkar, A.K.Mahant, Sudhir Singh, S M Tripathi, P K Sarkar, D N Sharma, Mary Alex, P M Dighe, Sadhna Bhattacharya, C G Panchal, R Karpagam, P Y Bansode, R K Jakati and P.K. Mukhopadhyay, Report no.- RRCAT/2007-04 (2007)

  7. Effect of kickers on electron beam loss in booster synchrotron, M K Nayak, Vijay Kumar, P K Sahani, G Haridas, K K Thakkar, A C Thakurta, RRCAT, (Feb 2007)

  8. Radiation Survey for photon/neutron dose rate in Indus-1 experimental hall for different operating conditions, Technical Report. RRCAT/HPU/07 (2007)

  9. Beam loss detection in TL-2 in Indus-1 hall, Technical note: RRCAT/HPU/07/TR-02 (August 2007)

  10. Radiation levels in Indus-1 Experimental hall during beam transport from booster to Indus-1/Indus-2, Technical note: RRCAT/HPU/07/TR-01 (August 2007)

  11. Radiation measurement around X-ray inspection set at Indore Airport, HPU, RRCAT, (Dec 2007)

  12. Draft report on compilation of induced activity measurement data in components of Indus Accelerator Complex, (2007)

  13. Study on electron beam loss due to variation in steering coil current in Booster Synchrotron, M K Nayak, Vijay Kumar, P K Sahani, Vipn Dev, Dimple Verma & G.Haridas, HPU, RRCAT, Indore, (Jan 2008)

  14. Radiation level study near SIP-5 of TL-2 using beam loss detectors during Indus-1/ Indus-2 Injection, M.K.Nayak, Vipin Dev & G.Haridas, HPU, RRCAT,  (Oct 2008)

  15. Source term and Shielding calculation for Indus-2 SR beam lines,HPU, RRCAT, (Apr 2008)

  16. Preliminary Report on Synchrotron and Bremsstrahlung Radiation Dose Measurement in Beam Lines of Indus-2, Health Physics Unit, RRCAT, (March 2009)

  17. Shielding Calculation for FEL LINAC, M.K.Nayak & G.Haridas, HPU, RRCAT, (Sep 2009)

  18. Report on shielding calculation for the radiation calibration cell at RRCAT, M K Nayak, G.Haridas, HPU, RRCAT, (Oct 2009)

  19. Ozone measurement and radiolytic yield estimation for air in Synchrotron Radiation beamlines. Saleem Khan, Vijay Kumar, Haridas G., B.S.Thakur, V. P. Dhamgaye. RRCAT Internal Report (RRCAT/2015-10)

  20. Radiation shielding evaluation report of HTS-2 facility at RRCAT, Indore, Vipin Dev, M. K. Nayak, P. K. Sahani, Health Physics Unit , RRCAT (June 2017)

Manuals

Radiation safety manuals for radiation facilities of RRCAT

Articles

  1. Vikiran Suraksha,  K.K.Thakkar, An article in Hindi in “PRAGATI”, in house magazine published by CAT, (1997)

  2. Indus-1 Mein Vikiran Suraksha Ke Upay, G.Haridas, An article in Hindi in “PRAGATI”, in house magazine published by CAT, (2002)

  3. Radio Frequency Aevam Microwave Suraksha, M.K.Nayak, An article in Hindi in “PRAGATI”, in house magazine published by CAT, (2005)

  4. Radiation Physics studies at Indus-1 synchrotron radiation source for radiation protection in high energy electron accelerators, Haridas G., RRCAT newsletter, Volume 21 (1), 34-39 (2008)

  5. Study of scattered synchrotron radiation dose at SR beamline hutches of Indus-2. P K Sahani and Haridas.G, RRCAT newletter, Vol. 25, Issue 1 page 17 (2012)

  6. Bremsstrahlung source term measurement for 450 MeV electrons. M.K.Nayak and Haridas.G, RRCAT newsletter, Vol. 25, Issue 1 page 18 (2012)

  7. Bremsstrahlung source term from optimum targets. M.K.Nayak and Haridas.G, RRCAT newsletter, Volume 29, Issue, page 15 (2016)

Awards & Recognition

  1. Letter of appreciation to Dr. Haridas.G by Dr. John Hubbell, National Institute of Standards & Technology (NIST) “Emiretus”, U.S.A & Vice-president, International Society for Radiation Physics, for research in high energy bremsstrahlung radiation dosimetry at Synchrotron Radiation Source, Indus-1 (2006)

  2. Dr. A.K.Ganguly Felicitation Prize -2010 was awarded to Dr. Haridas.G for outstanding contribution in radiation protection in low, medium & high energy accelerators by Indian Association for Radiation Protection (IARP) (2010).

  3. DAE Group Achievement Awards – 18 Nos.

Ph.D. / M.Tech Thesis

  1. Bremsstrahlung X-ray dosimetry studies at high energy electron accelerators for personnel protection. Haridas.G, Ph.D Thesis, Devi Ahilya Viswa Vidyalaya, Indore, India (Dec. 2006)

  2. Application of depth dose studies for radiation protection in high energy electron accelerator. M.K.Nayak, Ph.D Thesis, Devi Ahilya Viswa Vidyalaya, Indore, India (Jun 2016)

  3. Development of methodology for estimation of low energy synchrotron and high energy bremsstrahlung radiation dose. Debasis Sinha Mahapatra, M. Tech Thesis (Sep. 2012)

  4. Development of framework for probabilistic safety analysis of radiation safety systems of industrial accelerators, Priyangshu Dhara, M.Tech Thesis (Jan. 2017)

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