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Bergoz Beam Loss Monitor, BLM
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 The
Bergoz Beam Loss Monitor (BLM) is a
new approach to measure and localize beam losses. It uses two PIN photodiodes mounted face to face to detect charged particles. The charged particle passes through both PIN diodes, causing a coincidence in the detection circuitry. This makes it insensitive to synchrotron radiation photons that are generally stopped by the PIN diodes.
It's very small size and low cost make it possible to monitor all locations where beam loss is predicted. Vacuum quality around the storage ring may be based on the BLM count rate.
A Beam Loss Monitor pdf datasheet may be downloaded from here.
| The
BLM features |
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Low cost |
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Low spurious count rate: typically <1 in 10 seconds |
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A dynamic range >108 for a count rate of up to 10MHz |
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Fast recovery from a hit: typically <100ns |
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TTL output for easy interfacing to counters |
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Large PIN diodes may be user installed to change the detector solid angle. |
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Rad-hard, tested to 108 Rads |
| Specifications
- BLM |
| Singel Partical Detection Effiency |
>30% |
| PIN Photodiode Surface Area |
7.34mm2 |
| Spurious Count Rate |
<0.1Hz |
| Maximum Count Rate |
>10MHz |
Count Rate
@ 6 x 105 Rad/yearSR Photons
With 3cm Lead Shielding
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~ 100Hz
~ 1Hz |
| Output |
TTL Positive Pulse |
| Cable Drive Capability |
> 200 meters of RG213 |
| Connectors
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| Power and Signal |
Female HE10, 10 pins (2 x 5) |
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GMW
Associates, 955 Industrial Road, San Carlos, CA
94070, USA
Tel: (650) 802-8292, Fax: (650) 802-8298,
e-mail:
sales@gmw.com |
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