MSL type BB18 serial # 2977-20 bias +100V I_L +12.0uA T=23 deg C
(biased by nnaida # 3 & 5 )
DSSSD - AIDA adaptor PCB cabling
4 off LH Coupler (Kapton PCB, 5cm), 2x 34-way Samtec ribbon cable (62cm p+n, 53cm n+n),
RH coupler(Kapton PCB, 10cm)
+ 3M 1245 1.4mil copper foil screen ribbon cables (i.e. not RH & LH couplers)
+ drain wires -> gold-plated Lemo-00 test input connectors
to FEE64s in 4x FEE module crates
Snout drain wire to FEE module Cu block
nnaida 3 & 8 AIDA adaptor PCB rev C
nnaida 5 & 9 AIDA adaptor PCB rev C (LK1 fitted)
ground links LK3 & LK7 fitted to nnaida3, 5, 8, & 9 AIDA adaptor PCBs
*** Note added 11.58 sat 30 Apr 2016
Detector bias cable to nnaida3 & 5 adaptor PCBs *but* LK1 fitted to nnaida9 *not* nnaida5.
This has been set this way since start of current series of tests Wed 27 April. Connecting
via a different adaptor PCB to that connected to the CAEN N1419 bias supply causes significant
noise issues presumably due to high resistance path via 2x adaptor PCB to DSSSD cables
and the DSSSD bias bus line on the DSSSD.
Heavy duty copper cable connects copper front end frames of FEE modules
Nitto 5011N conductive gasket between FEE module and front end frames
Standard ASIC settings
nnaida 3 & 8 - negative input
nnaida 5 & 9 - positive input
Pulser BNC PB-4
Fall time 1.0ms
Rate c.100Hz
Delay min
Amplitude 50,000
Polarity -
Pulse top Tail
Atten 10x
+ polarity via EG&G Ortec 433A Sum & Invert Amplifier
Pulser peak widths broad, structured, non gaussian c. 200ch FWHM
attachments 1-4 ASIC # 1 waveforms for each acqserver with all acqservers connected to same PSU
attachments 5-6 for comparison, from yesterday, with acqservers from two different PSUs - note
absence of HF noise in attachments 1-4 cf. attachments 5-6. |