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

Progress Report, Oct 2005

Vik Dhillon (Univ. Sheffield)

Tom Marsh (Univ. Warwick)

Andy Vick (UKATC)

JRA L3 Detector development


V2 l3 driver board

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

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

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

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

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

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

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

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 tests1

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

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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