Implantation-Decay Experiment Rate Information ---------------------------------------------- CCLRC Daresbury Laboratory -------------------------- Daresbury Recoil Separator (DRS) MSL type PP(DS) Strip pitch 0.335mm Strip width 0.300mm Strip length 16mm Wafer thickness 0.065mm 48 p+n junction strips; 48 n+n ohmic strips Implantation Energy ~40-80MeV A~100-200 Rate ~2kHz Rate/strip ~40Hz Argonne National Laboratory --------------------------- Fragment Mass Analyser (FMA) MSL type BB5(DS) Strip pitch 0.400mm Strip width 0.350mm Strip length 32mm Wafer thickness 0.065mm 80 p+n junction strips; 80 n+n ohmic strips Implantation Energy ~40-80MeV A~100-200 Rate ~4kHz Rate/strip ~50Hz Both systems use the RAL108 charge sensitive preamplifier and RAL109 shaping amplifier/discriminator. The coupling capacitance in both systems is 10nF/200V. The low energy signal processing 20MeV FSR. Typical proton energy resolutions for new DSSSDs was ~15-20keV FWHM following overload recovery. National Superconducting Cyclotron Laboratory, MSU -------------------------------------------------- S1900 Fragmentation of 100-200MeV/u, A~50-100 ions, in-flight separation and implantation into Si DSSSD (Beta Counting System -BCS). MSL type BB1(DS) Strip pitch 1mm Strip width 0.9mm Strip length 40mm Wafer thickness 1mm 40 p+n junction strips; 40 n+n ohmic strips Implantation Energy ~?GeV, A~50-100 Rate ~100Hz? Rate/strip ~3Hz? Instrumentation Multi Channel Systems PA3300 dual gain preamplifier (0.03 or 0.09V/pC high energy implant, 2V/pC decay) http://www.multichannelsystems.com/products/nuclearelectronics/nuclearintro.htm With Pico Amplifier systems shaping amplifier for decay events. ac coupling? probably but not explicitly stated recovery time? not stated, experiments studying beta decays with lifetimes ~100ms. P.F.Mantica et al., NIM B241 (2005) 195 J.I.Prisciandaro et al., NIM A505 (2003) 140 multiplicity ~1 hit p+n strips; ~2 hits n+n strips with dual gain preamplifiers (cf. 5-6 with single gain preamplifiers used previously) threshold unknown S.N.Liddick, Ph.D thesis MSU, 2004