JRA%20L3%20Detector%20development

1
JRA L3 Detector development

• Progress Report, Oct 2005
• Vik Dhillon (Univ. Sheffield)
• Tom Marsh (Univ. Warwick)
• Andy Vick (UKATC)

2
V2 L3 Driver board

• 2nd Version of L3 Driver board now fully
  functional
• Can be added to any Gen III SDSU controller
  without modification
• Uses standard clock line boosted for L3 voltages
• Computer controlled clock level in 20mV steps
• Good stability

3
V2 Driver board tests

• Tested with E2V CC87
• In operation the driver meets our requirements
  BUT
• We are seeing clock induced charge as per other
  groups
• There is some feed through of noise to from the
  DSP circuitry on the SDSU
• Consequently we are planning to fabricate a third
  generation of L3 driver.

4
V3 Driver fabrication

• New driver uses a different voltage source to
  reduce noise
• New driver will provide more capabilities for
  shaping the clock pulse
• Already designed, awaiting fabrication

5
L3 Developments

• SDSU has two DSPs, one in the controller and one
  on a PCI board (via fiber link)
• PCI DSP is relatively unused
• We have added threshold detection code to the PCI
  DSP
• SDSU transfers raw images to PCI board
• PCI board thresholds, and builds up frame from
  photon data
• PCI board then transfers frame to PCI
• Fits into existing SDSU system (Ultracam)

6
JRA3 2004 Expenditure

• PPARC (UKATC) Submission to Opticon for 2004 was
  1523
• 913 Direct costs (manpower)
• 620 Indirect costs (travel equipment)
• Univ. Sheffield Submission to Opticon for 2004
  was 0
• Univ. Warwick Submission to Opticon for 2004 was
  0

7
JRA3 2005 Expenditure

• PPARC (UKATC) Expenditure so far in 2005 is
  aprox. 1,400
• 1000 Direct costs (manpower)
• 400 Indirect costs (travel equipment)
• Univ of Sheffield Expenditure so far in 2005 is
  aprox. 32,500
• Univ of Warwick Expenditure so far in 2005 is
  aprox. 700

8
JRA3 2005/2006 Prediction

• PPARC (UKATC) prediction for 1/1/05 to 30/6/06 is
  26,000 at the last estimate
• 20,000 Direct costs (manpower)
• 6,000 Indirect costs (travel equipment)
• Univ. of Sheffield prediction was 24,000
• 20,000 Direct costs (manpower)
• 4,000 Indirect costs (travel equipment)
• Univ. of Warwick prediction was 6,000
• 5,000 Direct costs (manpower)
• 1,000 Indirect costs (travel equipment)

9
L3 Spectroscopy tests

• Meeting at ATC 5th October with ESO staff
• Assumption is that we can use EMMI spectrograph
  on NTT, La Silla
• ESO are providing drawings for mounting etc
• ESO have said they will loan us an EMMI red
  cryostat if necessary
• Decision on whether we can use discretionary
  time, or have to apply for science time, is yet
  to be resolved

10
L3 Spectroscopy tests

• Need to develop
• Basic tests for L3 chip on sky
• Science tests for spectroscopy in photon counting
  mode
• Science tests for spectroscopy in low
  amplification mode
• We hope to be on sky in mid 2006
• Time for others to ask for science or instrument
  tests?

11
Expenditure to 30/6/2006

• 15 k New cryostat
• 4 k New clock driver board fabrication
• 2 k Miscellaneous cabling, racking and
  mechanical parts for EMMI mounting
• 10 k Mechanical effort at Sheffield (for
  cryostat interior, mounting for EMMI, etc)
• 20 k Electronics effort at UKATC on L3
• 15 k Shipping and travel to La Silla
• Total 66 k between the three institutions