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Stavelet Status Report

Stavelet Status Report. 30.09.2010 Peter W Phillips. Stavelet Numerology. The Stavelet. Stavelet IV Data at 22C. Leakage Current (microA). Detector Bias (V). All consistent with HPK data. Operating Information. Stavelet cooling

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Stavelet Status Report

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  1. Stavelet Status Report 30.09.2010 Peter W Phillips

  2. Stavelet Numerology The Stavelet

  3. Stavelet IV Data at 22C Leakage Current (microA) Detector Bias (V) All consistent with HPK data

  4. Operating Information • Staveletcooling • Pipes specified for CO2 but running with water for now • Water at 12.5C gives typically 45C on hybrids • Stavelet has many power options • So far using Serial Power with “M” shunt and PPB protection • Other options to be tested later (Spi, DC-DC, ...) • Low Voltage from either • Commercial TTi PSU • Jan Stastny’s Current Source • High Voltage from • SCTHV (VME version) • One Wire controller • Commercial DS8490R unit • Readout with HSIO • Stavelet is main testbed for development activity • Firmware by Matt Warren with contributions from Alexander Law and Bruce Gallop • Software by Peter and Bruce • AC coupled LVDS, MLVDS signals • BCC V2, 80 MHz dclk

  5. Checking the Basics Measure Vdd Probe BCO

  6. Hybrid Voltages vs Current V (V) I (A) The ABCN-25 “M” shunt and the hybrid’s control circuitry work as expected: Constant hybrid voltage from 4.0A

  7. Duty Cycle of Recovered BCO Hybrid 0 Hybrid 7 Output of MLVDS driver on End of Stave Card has 51.5% duty cycle Preliminary termination resistors: 56R end term, 100R back term Further optimisation could improve this, but already a good place to start

  8. Thermal images of The Staveletin Operation All hybrids on 22.7V 5.09A Slow control disables odd hybrids 12.7V 5.09A Slow control disables even hybrids Each hybrid may be bypassed using the PPB 1-wire operated shunt Voltage differences consistent with 2.5V per hybrid

  9. Stavelet ENC @2fC, JS CS II@5A After Trimming, reading all hybrids simultaneously, column 1 strip order corrected.

  10. Stavelet ENC @2fC, JS CS II@5A After Trimming, even hybrids bypassed, column 1 strip order corrected.

  11. Preliminary Stavelet NO, JS CS II@5A After Trimming.

  12. Summary • The first stavelet has been successfully built • Sensors not damaged during assembly • HSIO Firmware and software developed to the point at which the stavelet may be read out • Using BCC V2, 80 MHz DCLK • Preliminary results are very encouraging • SP with shunt “M” and PPB protection working • AC coupled LVDS (data) and MLVDS (clk, com) working • Noise approximately correct • Work in progress to define a full list of tests to be made • To include other power options

  13. Backup Slides

  14. Stavelet ENC @1fC, TTi Supply @ 5A After Trimming, reading all hybrids simultaneously, column 1 strip order corrected.

  15. Stavelet ENC @2fC, TTi Supply @ 5A After Trimming, reading all hybrids simultaneously, column 1 strip order corrected.

  16. Stavelet ENC @1, JS CS II@5A After Trimming, reading all hybrids simultaneously, column 1 strip order corrected.

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