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GLAST Large Area Telescope: TKR Hand-off review for Tower 6 Hiro Tajima SU-SLAC R. P. Johnson

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GLAST Large Area Telescope: TKR Hand-off review for Tower 6 Hiro Tajima SU-SLAC R. P. Johnson - PowerPoint PPT Presentation


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Gamma-ray Large Area Space Telescope. GLAST Large Area Telescope: TKR Hand-off review for Tower 6 Hiro Tajima SU-SLAC R. P. Johnson UCSC. Power Consumption. Values for MCM measurements account for the increase due to PS voltage itself, not current increase due to voltage increase.

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slide1

Gamma-ray Large Area Space Telescope

GLAST Large Area Telescope:

TKR Hand-off review for Tower 6

Hiro Tajima

SU-SLAC

R. P. Johnson

UCSC

power consumption
Power Consumption
  • Values for MCM measurements account for the increase due to PS voltage itself, not current increase due to voltage increase.
band channels tower 6
Band Channels (Tower 6)

No major change observed.(except for layers indicated by yellow background.)

hit trigger efficiency
Hit/Trigger Efficiency

• Sizable drop in Y9 and Y17 (No change in # of bad channels.)

• Small degradation (0.1%) of average efficiency might be due to TACK delay timing difference.

(0 µs @Pisa, 1 µs @SLAC.)

other anomalies
Other Anomalies
  • TE701 (Trigger Jitter test) failure on both towers.
    • This is an issue of requirement interpretation.
    • Working with trigger group to define clear requirement.
  • TE301 (Noise and Gain Test) failed on layer X3.
    • Known issue from Italy.
  • Tower 6 failed clock duty cycle margin test @ 58%.
    • Y2-LO and X9-LO failed on data readout test.
    • It passed at 55% (within specification).