Technical information

Specifications

Detectors:

Plastic scintillator 30 x 9 x 5 cm3 (with PMT R580) or 40 x 9 x 5 cm3 (with PMT R6094)
Photomultiplier Hamamatsu R580 (earlier types) or Hamamatsu R6094 (recent types)

Complete assembly of R580 detector (with R6094 some minor modifications)


Click image above to enlarge.

Signal analyzer:

Electronic circuit based on FPGA and VHDL firmware saved in EPROM
Powered by 12 V DC adapter from 220 V AC mains
Instrument is NEN 3140 certified

2 DIN output plugs for adjustable DC supply voltage for PMT's HV generators inside detectors
2 BNC input plugs for connection of signals from detectors
USB Standard-B input connector for connection of the analyzer to the computer

2 types of PMT can be powered depending on the exe application:
    Hamamatsu R580 maximum HV 1700 V (earlier types)
    Hamamatsu R6094 maximum HV 1000 V (recent types)

Click images above to enlarge.

Message protocol:
The data that is sent out by the signal analyser over USB serial follows the protocol describes in this pdf file. The workings of the analyser are also described here. Download Message_Protocol_MuonLab_III_v4.pdf

Safety directives

MuonLab complies with the safety directives as described in:
1)  Directive 2006/95/EC, NEN3140 (low voltage)
2)  Directive 89/655/EEG (use of work equipment by workers at work)

Name/Function Date Initials
J.G.Oldenziel/physicist June 2014 JGO
M. Vervoort/safety expert June 2014 MV

Warnings

The photomultiplier tube (PMT) inside the scintillation detector contains an internal electronic circuit that transforms the low voltage from the external power supply into a high voltage needed for the electrodes.
The PMT vacuum tube is surrounded by a metal shield, connected to the high voltage. The outside of the metal shield is covered by a protective insulation.

The PMT is extremely sensitive to light. Always protect the PMT from exposition to daylight when power is supplied to the low voltage connection of the PMT.

Opening of the enclosure of the scintillation detector is only allowed to well trained personnel. Take care that the low voltage power supply to the PMT is disconnected.

Disclaimer

Nikhef cannot be made responsible for any damage caused by incorrect handling of the MuonLab measuring instrument.