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HF Laser / LED Calibration. Total of 8 Calibration Boxes (CBOX) for HF CBOX contains Small blue scintillator (UV → blue) 1 × 9 Splitter (each CBOX serves 9 PMT RO Boxes) 2 blue LEDs – pulsed by LED driver 3 PINs – use 5V off backplane to power!
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HF Laser / LED Calibration Total of 8 Calibration Boxes (CBOX) for HF • CBOX contains • Small blue scintillator (UV →blue) • 1×9 Splitter (each CBOX serves 9 PMT RO Boxes) • 2 blue LEDs – pulsed by LED driver • 3 PINs – use 5V off backplane to power! • CBOX should also contain –preferred packaging • QIE card to read out 3 PINs –only 3 QIE channels per CBOX! • LED driver –need >5V to allow larger dynamic range! • CBOX space in HF crate • One CBOX per HF rack • Need 5 (minimum 4) slots in a HF crate • HF crate may need additional voltage(s) depending on LED driver!
HF laser / LED Calibration @ 2004 Beam Test 2 HF wedges tested at a time – read out through the same 4 ROBOXs • HF laser/LED calibration setup • UV laser + neutral density filters • 1×4 Splitter + various fibers • 1 CBOX 1 QIE card and 1 LED driver • 4 CLIs • HF crate – read out QIE and power PINs and LED driver • Issues • QIE card/software ready? • LED driver ready? Its features, e.g. variable pulse to allow single PE calibration? • Need to know the schedule ASAP
HF Laser / LED Calibrationsingle PE calibration – 2003 beam test
HF Calibration Optical Fiber Path HF + Counting Room Calib Box N2 Laser 9 Calib Box 9 300 mJ 337 nm 600 QP Top Rack Top Rack 300 QQ 150m 9 PMT Boxes 9 PMT Boxes 300 QQ 1 4 9 PMT Boxes 9 PMT Boxes HF - Bottom Rack 9 Bottom Rack 9 Calib Box 600 QP Calib Box 9 PMT Boxes / Quad 24 PMT Tubes / Box 216 PMTs / Quad 864 PMTs / End 1728 PMTs Total
