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SUMMARY:Calorimetry for Synchrotron radiation
DTSTART;VALUE=DATE-TIME:20141120T063000Z
DTEND;VALUE=DATE-TIME:20141120T080000Z
DTSTAMP;VALUE=DATE-TIME:20260711T060848Z
UID:indico-contribution-710@events01.synchrotron.org.au
DESCRIPTION:Speakers: Ganesan Ramanathan (ARPANSA)\nCalorimetry is the mos
 t accurate method of quantifying the x-ray flux and dose in the synchrotro
 n beam lines for medical and research applications.  In calorimetry\, the 
 radiation dose absorbed results in raising the temperature of the absorbin
 g medium which is measured accurately. Several absorbing media have been t
 ried but graphite with relatively low specific heat and zero heat defect h
 as been the chosen medium for calorimetry.\nGraphite calorimeters are dose
 -rate independent and hence can be used over wide dynamic range of intense
  synchrotron x-ray beams. They are energy-independent and hence are ideall
 y suited to measure the total energy fluence over the entire low energy ph
 oton spectrum compared to  diodes\, films etc.  The temperature rise due t
 o the absorbed dose is high (of the order of several milli-kelvins) result
 ing in  simple read-out instrumentation.\nThe design criteria of the ARPAN
 SA graphite calorimeter which was successfully used to measure the high do
 se-rates (~2500 Gy/sec) in Hutch1B and  (~50 Gy/sec) in Hutch 3B at the Au
 stralian Synchrotron is presented in this talk. The need for absorbed dose
  to water is realised through Monte Carlo calculations of the conversion f
 actor from the graphite absorbed dose measured by the calorimeter. The tal
 k also includes the different calorimeters used earlier internationally fo
 r photon fluence measurements different from the unique application of the
  ARPANSA calorimeter for the IMBL measurements.\n\nhttps://events01.synchr
 otron.org.au/event/3/contributions/710/
LOCATION: NCSS Exhibition Area
URL:https://events01.synchrotron.org.au/event/3/contributions/710/
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