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Calibration prototype for the EUDET HCAL | | J. Cvach
; M. Janata
; J. Kvasnicka
; D. Lednicky
; I. Polak
; J. Smolik
; J. Zalesak
; | | Date: |
25 May 2011 | | Abstract: | The electronics producing a few nanoseconds long LED pulses tuneable in the
amplitude and the optical system distributing the LED light to scintillators by
a single optical fibre are described. The properties of the LED pulses are
controlled by a computer connected via a CANbus to the controller on the board.
We produced a prototype with 6 LED pulse drivers placed on a 4-layer PCB with
dimension 250 x 147 mm2. The pulse width is constant and 3 ns long. Its
amplitude can be tuned from zero to 1.2 A. The pulse frequency can be set in
the range up to 100 kHz. The LED light is distributed by a 1 mm diameter
optical fibre. On the length of 2 m the fibre has every 30 mm a notch which
flashes light with homogeneity of pm20%. The system is foreseen for
calibration of silicon photomultipliers embedded in scintillation tiles. | | Source: | arXiv, 1105.5034 | | Services: | Forum | Review | PDF | Favorites | |
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