We are preparing Silicon Drift Detecters (SDDs) for a precision spectroscopy of kaonic helium-3 3d→2p x-rays (∼6.2 keV) at J-PARC (E17, DAY-1). Since we need to operate SDDs and their preamplifiers in a cryogenic system, their low-temperature behavior was investigated. The optimal operational temperatures were found to be 110 - 130 K and over 270 K for SDDs and preamplifiers, respectively. In such condition, energy resolution is around 150 eV (FWHM) with 5.9 keV x-rays and time resolution is around 400 ns (FWHM). We also investigated the effect of different incident angles to verify our calibration method in E17. Although response function depends on incident angle, Mn Ka peak positions differ at most 0.5 eV equivalent. Further basic studies of SDDs are ongoing toward the physics run planned in 2011.
|Journal||Journal of Physics: Conference Series|
|Issue number||SECTION 5|
|Publication status||Published - 2011|
|Event||International Nuclear Physics Conference 2010, INPC2010 - Vancouver, BC, Canada|
Duration: 2010 Jul 4 → 2010 Jul 9
ASJC Scopus subject areas
- Physics and Astronomy(all)