MICE Tracker Electronics Update Progress towards a tracker

MICE Tracker Electronics Update Progress towards a tracker test at KEK

Status: VLPC System · The VLPC system is complete and operating to spec u Can easily control to the 9 K spec. s With heaters off T=5. 3 K · Uses a Sumitomo SRDK -415 D Cryo-cooler. u This is the unit we plan to use throughout MICE

Status: Cryo System · Full Commissioning done – Performance To Spec!!! Operating period #1 March 30 #2 April 11 #3 April 22 55 K 47 K 41 K 50 Watts 45 Watts 38 Watts 55 W 50 Watts 14 K 7. 9 K 7. 2 K 5. 3 K 5. 5 Kelvin 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 Stage 1 lowest Stage 1 heat load Stage 2 lowest Stage 2 heat load #4 April 28 47 K Design Values 45 Kelvin

Cryo Gas System

Status: Cryo System · However, we did have problems with thermal links in the cryostat as you know. u Thermal contact was unreliable s u 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 u 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 u u Thermal clamp redesign Address top-plate flatness s u u 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 D 0. These are now working 512 ch ADC Discrim. TDC in next version

Status Electronics · 6 AFE II boards have now been fully tested and are available to MICE u u u 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 u u u Noise Gain Dead channel count · Implement replacement board for sequencer control (readout controller) u u This will allow for much more efficient asynchronous triggering Test trigger · Cosmic ray test with tracker at Fermilab u THE TRACKER HAS ARRIVED AT FERMILAB!

Timescale · Next two weeks u u Get 4 board readout working Get sequencer controller replacement working · July 18 -22 u Calibrate VLPC Cassettes · July 25 -29 u Cosmic Ray Test · August 1 u Pack and Ship to KEK · August 8 -12 u Preliminary setup and shakeout at KEK s At least operate VLPC cryo 大丈夫