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Vacuum Operation

The XR-100 can be operated in air or in vacuum down to 10^-8 Torr. There are two ways the XR-100 can be operated in vacuum.

Option A: The entire XR-100 detector and preamplifier box can be placed inside the chamber. In order to avoid overheating and dissipate the 1 Watt of power needed to operate the XR-100, good heat conduction to the chamber walls should be provided by using the four mounting holes. An optional Model 9DVF 9-Pin D vacuum feedthrough connector on a Conflat is available to connect the XR-100 to the PX2 or PX4 outside the vacuum chamber.

Option B: The XR-100 can be located outside the vacuum chamber to detect X-Rays inside the chamber through a standard Conflat compression O-ring port. Optional Model EXV9 (9 inch) vacuum detector extender is available for this application. See figure

Both Option A & B for vacuum chamber pressures to 10^-8 torr.

Option A

Option B

Figure 3.

Required items

• XR-100CR or XR-100T-CdTe
• EXV9
• CP75 Feedthrough coupling
• PX2CR/PX2T-CdTe or PX4

Option B Mechanical Dimensions

Figure 4. All dimensions are in inches except as noted.

Figure 5. The XR100 and the X-123 with 9 inch extenders and CP75 feedthrough couplings.

Model CP75

Vacuum feedthrough coupling on 2 3/4" Conflat for use with the EXV9.

Figure 7. All dimensions are in inches except as noted.

Model 9DVF

9 pin D-subminiature vacuum feedthrough connector mounted on a standard 2 3/4" stainless steel Conflat.

Figure 8. All dimensions are in inches except as noted.

EXVC Collimator Kit for the EXV9

Figure 9. All dimensions are in inches except as noted.

The EXVC - Collimator Kit Includes

• Stainless steel collimator housing
• Brass Spacer
• Tripod and mounting plate (included when ordering for use with standard 1.5 inch extender box)
• Laser pointer
• 7 Tungsten (W) Collimator disks:
• 1 mm thick with 25 µm hole
• 1 mm thick with 50 µm hole
• 2 mm thick with 100 µm hole
• 2 mm thick with 200 µm hole
• 2 mm thick with 400 µm hole
• 2 mm thick with 1000 µm hole
• 2 mm thick with 2000 µm hole

Optional: EXVC-W-SPACER
This Tungsten (W) Spacer /Collimator is 35 mm thick with a 350 µm hole. It is designed to stop and collimate x-rays greater than 100 keV produced from high energy tubes.

All Tungsten disks are made of alloy HD17 (90% W, 6% Ni, 4% Cu).

Revised June 18, 2007