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http://nopr.niscpr.res.in/handle/123456789/14302| Title: | Low energy pulsed X-ray ion chamber monitor for accelerator safety |
| Authors: | Dighe, P M Kamble, L P Das, D Pithawa, C K |
| Keywords: | Ion Chamber;Pulsed X-ray;Electron accelerator;Area monitoring |
| Issue Date: | Jul-2012 |
| Publisher: | NISCAIR-CSIR, India |
| Abstract: | Ion chamber sensitive to low energy pulsed X-rays has been developed for area monitoring at the electron accelerators Indus 1 and 2 of Raja Ramanna Centre for Advanced Technology, Indore. Conventional monitors available commercially underestimate the X-ray background because of pulsed nature of the radiation and are not sensitive to X-rays below 100 keV. For this purpose, a high pressure ion chamber made of aluminium with all welded construction has been developed and tested for use in pulsed X-ray background. The chamber has 25 litre sensitive volume, filled with nitrogen at 85 psi and current sensitivity is 12 nA/R/h. The chamber can measure exposure levels from 20 mR/h to 100 mR/h and has uniform energy response within ±12% from 35 keV to 1.25 MeV of X-ray energy. The ion chamber gave more than 86% collection efficiency at 100 mR/h average pulsed X-ray background for 500 V operating voltage. Theoretically evaluated collection efficiency values closely match with the experimentally observed values. The design details and characterisation of the ion chamber under different X-ray energy exposures and collection efficiency estimation for pulsed X-ray background have been studied. |
| Page(s): | 458-461 |
| ISSN: | 0975-1041 (Online); 0019-5596 (Print) |
| Appears in Collections: | IJPAP Vol.50(07) [July 2012] |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| IJPAP 50(7) 458-461.pdf | 217.7 kB | Adobe PDF | View/Open |
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