mice tracker electronics update
DESCRIPTION
MICE Tracker Electronics Update. Progress towards a tracker test at KEK. Status: VLPC System. The VLPC system is complete and operating to spec Can easily control to the 9K spec. With heaters off T=5.3K Uses a Sumitomo SRDK-415D Cryo-cooler. This is the unit we plan to use throughout MICE. - PowerPoint PPT PresentationTRANSCRIPT
MICE Tracker Electronics Update
Progress towards a tracker test at KEK
Status: VLPC System
The VLPC system is complete and operating to spec
Can easily control to the 9K spec.
With heaters off T=5.3K
Uses a Sumitomo SRDK-415D Cryo-cooler.
This is the unit we plan to use throughout MICE
Status: Cryo System
Full Commissioning done – Performance To Spec!!!
Operating period #1March 30
#2April 11
#3April 22
#4April 28
Design Values
Stage 1 lowest 55 K 47 K 41 K 47 K 45 Kelvin
Stage 1 heat load 50 Watts 45 Watts 38 Watts 55 W 50 Watts
Stage 2 lowest 14 K 7.9 K 7.2 K 5.3 K 5.5 Kelvin
Stage 2 heat load 22 Watts 10 Watts 7 Watts 3 to 4 W 3 Watts
Slot 1, Cass#105 ? 20.7 K 16.8 K 7.5 K 8 Kelvin
Slot 2, Cass#111 ? 20 K 23.7 7.1 K 8 Kelvin
Cryo Gas System
Status: Cryo System
However, we did have problems with the thermal links in the cryostat as you know.
Thermal contact was unreliable
Gaps lead to vacuum space and, of course, provided VERY GOOD insulation
This was corrected with the addition of In wire compressed between the Invar box and the clamps
Status: Cryo System
We have updated the design (Russ Rucinski and Michael Sarychev
Provides positive clamping!
Status: Cryo System
Status: Cryo System
So our plan is to do a full interation of the cryostat design and be ready for production of the second system late Fall
Thermal clamp redesign Address top-plate flatness
Top plate was not quite as flat as we would like. VLPC cassette seal leaked slightly and non-standard gaskets had to be used. Sealed well, but not overly elegant
Simplify G-10 backing plates Increase can diameter by 2 cm
Status:Electronics
The system will use 4 AFE II boards from D0. These are now working
512 chADCDiscrim.TDC in nextversion
Status Electronics
6 AFE II boards have now been fully tested and are available to MICE
All Channels tested Temperature and bias control operation LVDS readout functional
Still need to run the boards through the temperature and bias control calibration test stands
Things still to do
Test readout of 4 boards through VSLB to VME Calibrate the two VLPC cassettes with LED pulser
Noise Gain Dead channel count
Implement replacement board for sequencer control (readout controller)
This will allow for much more efficient asynchronous triggering
Test trigger Cosmic ray test with tracker at Fermilab
THE TRACKER HAS ARRIVED AT FERMILAB!
Timescale
Next two weeks Get 4 board readout working Get sequencer controller replacement working
July 18-22 Calibrate VLPC Cassettes
July 25-29 Cosmic Ray Test
August 1 Pack and Ship to KEK
August 8-12 Preliminary setup and shakeout at KEK
At least operate VLPC cryo
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