horiba JOBIN YVON SYNAPSE, Руководство пользователя

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Detector System Component Description
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Detector Head Chamber and Cooling Effectiveness
All Synapse CCD detector heads contain a high-vacuum front end which houses the CCD
sensor, as well as, the Peltier cooling element. The design includes a single-window
element, made of fused silica or magnesium fluoride for deep-UV response. All materials
in the forward chamber are selected to be of UHV grade materials and techniques, to
minimize outgassing and maximize emissivity, thus offering the highest cooling
efficiency. Each Synapse CCD system is evacuated at the factory on a dedicated
production line, using permanent, hard metal seals. There is no user maintenance
required.
The cooling of the CCD sensor relies on the quality of the vacuum. Any degradation of
the vacuum, such as by fracturing of the window due to physical damage, is evidenced by
the inability of the Synapse CCD to reach operating temperature. The cooling system
status is displayed on the detector’s rear interface, as a bi-color TEMP LED. While in
cooldown mode, the TEMP LED will illuminate as yellow, indicating that the Peltier
device is powered and cooling the sensor. Once the temperature setpoint is reached, the
system will enter closed-loop mode, and the TEMP LED will turn green, indicating a
temperature lock at the desired setpoint.
If the Synapse CCD is damaged, and the vacuum is compromised, the TEMP status LED
will remain yellow, indicating that the system cannot reach the desired setpoint. Please
contact the factory for advice in the event that the system cannot reach the setpoint within
30 minutes from power up, or if physical damage to the instrument is suspected. It is not
advisable to operate the Synapse CCD in a compromised vacuum state, as potential
moisture entering the head will condense and then freeze within the Peltier stack, causing
further damage. In addition, moisture in the CCD area could cause corrosion of sensitive
areas including the CCD sensor itself.
Detector Head Electrical Interfaces
Synapse detector heads provide the following external interface connections for proper
system operation:
•
Power
•
USB 2.0 Communication
•
Shutter
•
TTL Input
•
TTL Output
•
Auxiliary Analog Port
•
External I
2
C
•
Temperature Status LED
•
Power Status LED
Figure 11.
Detector Head Electrical Interfaces