Thermo Scientific SAM12, Руководство пользователя

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Issue: 1.0 Description
Thermo Fisher Scientific SAM12 User Manual 2-1
Chapter 2
Description
Main Frame Type 5568A
The Main Frame, type 5568A, is manufactured from a sturdy
fabricated steel construction. Mounted on top of the main
frame is the Electronics Chassis, containing the Controller
Board, Battery and Battery Controller Board, two or three HV
and Amplifier Boards, a single Coincidence detector card, user
interface connections, user control, keyswitch and LCD display
with touch screen.
The inside of the frame is clad on all sides, including the doors,
with either 25mm (1") or 50mm (2") of lead to minimise the
effect of background radiation.
The scintillation detectors are mounted on the faces and doors
of the cabinet. A stainless steel liner fits inside the cabinet to
form a sealed cubicle which covers and protects the detectors.
A further stainless steel liner covers the lead on the inside of
the doors. The outside of the cabinet is clad with stainless steel
in-fill panels. The whole cabinet stands on two box sections,
mounted one on each side and running front to rear. These box
sections provide access for a Fork Lift truck.
Scintillation Detector Type 5569A
Each of the six detectors, type 5569A, is a large area plastic
scintillator wrapped in foil and plastic, mounted in an
aluminium jacket. A photomultiplier tube is embedded in the
plastic. Connection to the dynode chain assembly, type 5462A,
mounted on the back of the tube, is via a light-tight gland. A
single coaxial cable provides high voltage for the tube and
carries the signals to the HV and Amplifier PCB via an MHV
connector.
Electronics Chassis Type 5689A
The Electronics Chassis, type 5689A, comprising of a Base
Plinth and Top cover, is mounted on top of the Main Frame.
Once the Top Cover is removed, four fixings allow the Base
Plinth to be detached from the Main Frame to facilitate easy
maintenance.