Safety at the H4 testbeam for UK personnel
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			D. Cockerill, 30.9.2003

 Hazards
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 0) All UK personnel working at the H4 area for the first time should request a tour
 of the installations and an explanation of the hardware being used.
 Contact Maurice Haguenauer, Portable:16+0670 who is responsible for the H4 area
 or Dave Cockerill, x71642, run coordinator for 2003.

 1) Radiation
 The area is a radiation zone. A CERN film badge must be worn at all times.
 Film badges from the dosimetry service, Bat 24, sous-sol.

 2) High Voltage
 ECAL barrel detectors are operated with high voltage (~<500V) to the APDs.
 Only HV experts are permitted to touch/go near any HV hardware.

 No UK personnel are permitted to touch/go near any HV hardware.
 Only intervention via software, with the permission of the HV experts, is allowed.  

 3) Low Voltage
 The ECAL is operated with various low voltage lines
 (-2V, +5V to analogue (FPPA), +5V to digital) to the front and very front end.
 Only LV experts are permitted to touch/go near any LV hardware.

 No UK personnel are permitted to touch/go near any LV hardware.

 4) Turntable
 The Supermodule turntable is controlled from a panel in the counting room.
 UK staff should always be in the presence of another person if near the table
 due to the risk of table movement.

 5) Readout lasers
 The data from the tests at H4 are readout from lasers on the FE along fibre optic cables.
 Only experts are permitted to work on the laser fibre optic readout/cables.

 NO UK personnel are permitted to touch/go near the FE lasers or fibre optic cables for the
 readout.

 6) Xtal monitoring lasers
 The lasers are housed in a laser barrack next to the H4 turntable area.
 They provide light at the following wavelengths: 440, 495, 709, 800nm.

 NO UK personnel are permitted into the laser barrack.
 Only laser experts are permitted entry.

 NO UK personnel are permitted to touch/go near the lasers or fibre optic cables used 
 for the monitoring.

 7) Normal mains-operated equipment
 Such equipment is used throughout the H4 and H4 counting room area, giving a 
 risk of electric shock.

 NO UK personnel are permitted to interfere with mains-operated equipment in the H4
 area.

 8) Water cooling system
 The ECAL receives cooling water at ~0.5-1 litre/s at 18 deg C, from a dedicated cooling plant.
 This plant is operated by experts.

 NO UK personnel are permitted to interfere with, or operate, the cooling plant in the H4
 area.