First results of KALI-30 GW with 1 MV flash X-rays generation and characterization by Imaging plate

Sharma, Archana; Shaikh, A. M.; Senthil, K.; Mitra, S.; Chandra, Rohit; Vishnu, S; Sandeep, S; Roy, Amitava; Rakhee, M; Sharma, Vishnu; Danish, M.; Kolge, Tanmay; Ranjeet, K.; Agrawal, R.A.; Saroj, P. C.; Tewari, Somesh Vinayak; Mittal, K. C.

doi:10.1088/1748-0221/9/07/p07011

Cited by 5 publications

References 15 publications

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Development of cable fed flash X-ray (FXR) system

Menon

Mitra

Patel

et al. 2017

Review of Scientific Instruments

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Flash X-ray sources driven by pulsed power find applications in industrial radiography, and a portable X-ray source is ideal where the radiography needs to be taken at the test site. A compact and portable flash X-ray (FXR) system based on a Marx generator has been developed with the high voltage fed to the FXR tube via a cable feed-through arrangement. Hard bremsstrahlung X-rays of few tens of nanosecond duration are generated by impinging intense electron beams on an anode target of high Z material. An industrial X-ray source is developed with source size as low as 1 mm. The system can be operated from 150 kV to 450 kV peak voltages and a dose of 10 mR has been measured at 1 m distance from the source window. The modeling of the FXR source has been carried out using particle-in-cell and Monte Carlo simulations for the electron beam dynamics and X-ray generation, respectively. The angular dose profile of X-ray has been measured and compared with the simulation.

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Development of cable fed flash X-ray (FXR) system

Menon

Mitra

Patel

et al. 2017

Review of Scientific Instruments

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Evaluation of silicon and indium gallium arsenide photodiodes as direct timing detectors for pulsed x-ray systems

Brown,

Remelius,

Smilowitz

2024

Review of Scientific Instruments

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Benchtop pulsed x-ray systems are commonly used to record dynamic material data on the order of nanoseconds, but pulse timing is often difficult to accurately determine. This study demonstrates that commercially available photodiodes can be used effectively for direct x-ray pulse detection without the need for visible light scintillators. X-ray pulses from four commercially available flash x-ray systems were quantified using one silicon and two indium gallium arsenide (InGaAs) photodiodes. The measured InGaAs pulse durations were strongly dependent on radiation dose in the non-linear operating regime, so the photodiodes were shielded to operate below the 2.5 V non-linear regime threshold. The average pulse duration and pulse arrival time jitter of the photodiodes for each x-ray source were within several nanoseconds with the exception of two sets of measurements that were affected by low instrument sensitivity and electrical noise. These results show that InGaAs photodiodes can be used as effective and repeatable stand-alone timing diagnostics for x-ray pulses as short as 20 ns or less.

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