MICE Tracker Electronics Update

1
MICE Tracker Electronics Update

• Progress towards a tracker test at KEK

2
Status VLPC System

• The VLPC system is complete and operating to spec
• Can easily control to the 9K spec.
• With heaters off T5.3K
• Uses a Sumitomo SRDK-415D Cryo-cooler.
• This is the unit we plan to use throughout MICE

3
Status Cryo System

• Full Commissioning done Performance To Spec!!!

4
Cryo Gas System
5
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

6
Status Cryo System

• We have updated the design (Russ Rucinski and
  Michael Sarychev
• Provides positive clamping!

7
Status Cryo System
8
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

9
StatusElectronics

• The system will use 4 AFE II boards from D0.
  These are now working
• 512 ch
• ADC
• Discrim.
• TDC in next
• version

10
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

11
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!

12
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
• ???