Progress report oct 2005 vik dhillon univ sheffield tom marsh univ warwick andy vick ukatc
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Progress Report, Oct 2005 Vik Dhillon (Univ. Sheffield) Tom Marsh (Univ. Warwick) Andy Vick (UKATC). JRA L3 Detector development. V2 L3 Driver board. 2 nd Version of L3 Driver board now fully functional Can be added to any Gen III SDSU controller without modification

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JRA L3 Detector development

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Progress Report, Oct 2005

Vik Dhillon (Univ. Sheffield)

Tom Marsh (Univ. Warwick)

Andy Vick (UKATC)

JRA L3 Detector development


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


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.


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


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)


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€


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 €


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)


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


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?


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


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