Amptek XR-100CR User manual

OPERATING MANUAL
XR-100CR
X-RAY DETECTOR SYSTEM
and PX2CR POWER SUPPLY / SHAPER
Revision 13
October 2003
AMPTEK Inc. 14 DeAngelo Drive, Bedford, MA 01730-2204
Tele: [phone] Fax: [phone] E-mail: [email protected] www.amptek.com

Amptek Inc. XR-100CR Manual
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Table of Contents
1CAUTION ........................................................................................................................................3
2SYSTEM SPECIFIC PERFORMANCE ...........................................................................................5
3CONNECTION DIAGRAM: XR-100CR/PX2CR/MCA8000A (Figure 1) .........................................7
4OPERATING NOTES FOR THE XR-100CR CONNECTED TO THE PX2CR ................................8
5RISE TIME DISCRIMINATION (RTD) IN THE PX2CR AMPLIFIER .............................................10
6PILEUP REJECTION (PU) IN THE PX2CR AMPLIFIER ..............................................................10
7INPUT COUNT RATE (ICR) IN THE PX2CR AMPLIFIER ............................................................11
8XR100CR / PX2CR Reset Waveforms..........................................................................................12
9XR-100CR / PX2CR TROUBLESHOOTING .................................................................................13
10 XR-100CR CONNECTION DIAGRAM WITHOUT PX2CR (Figure 2) ..........................................14
11 OPERATING NOTES FOR THE XR-100CR WITHOUT THE PX2CR .........................................15
11.1 Equipment Required ................................................................................................15
11.2 Absolute Maximum Ratings .....................................................................................15
11.3 6-Pin Lemo Connector on the XR-100CR (Lemo Part# ERA.1S.306.CLL) .............15
11.4 9-Pin Cable D-Connector to PX2CR or External Power (standard 9-Pin D)............15
11.5 Connections and Turn-On Procedure (see figure 2)................................................15
12 PROCEDURE TO LOWER THE HIGH VOLTAGE BIAS IN THE DETECTOR............................17
13 WARRANTY .................................................................................................................................18
13.1 Technical Questions ................................................................................................18
14 INTERNAL CONNECTIONS BETWEEN AXRCR / XR-100CR / PX2CR.....................................19
15 PX2CR FRONT AND BACK PANELS..........................................................................................20
16 XR-100CR EFFICIENCY CURVES ..............................................................................................21
17 APPLICATION NOTES.................................................................................................................22
17.1 Use of Collimators....................................................................................................22
17.2 Detector Edge Effects (25 mm2 and 5 mm2, 500 m thick) ......................................23
18 X-RAY FLUORESCENCE (XRF) – A DESCRIPTION..................................................................24
19 XR-100CR-EX1.5 MECHANICAL DIMENSIONS .........................................................................26
20 XR-100CR SELECTION CHART (as of 7/08) ..............................................................................27
21 AMPTEK K AND L EMISSION LINE LOOKUP CHART ...............................................................28
22 PX2CR POWER SUPPLY SCHEMATIC FOR XR-100CR (Figure 3) ..........................................29
23 PX2CR SHAPER SCHEMATIC....................................................................................................30

Amptek Inc. XR-100CR Manual
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1 CAUTION
1. DO NOT DROP OR CAUSE MECHANICAL SHOCK TO THE XR-100CR DETECTOR
2. DO NOT DAMAGE the AXRCR detector element.
3. DO NOT REMOVE the red protective cap from the AXRCR detector until data is to be taken.
The detector window is made from thin beryllium (0.001 in / 25 µm thick) which is extremely
brittle and can shatter very easily. Do not have any object come in contact with the window. Also,
do not touch the window because the oil from the fingers will cause it to oxidize. The window
cannot be repaired. If the window shatters the detector assembly must be replaced. Keep the red
protective cover nearby at all times and cover the AXRCR detector when the instrument is not in
use. Beryllium windows damaged by improper handling will not be covered by the warranty.
4. AVOID holding the XR-100CR in the hand. Heat from the body will increase the operating
temperature of the detector and increase the leaking current. Increased leaking current in the
detector will result in poor energy resolution. Keep the XR-100CR away from incandescent lamps
to avoid overheating.
5. BEST PERFORMANCE of the XR-100CR can be achieved by mounting it by one or two of its
mounting holes to a metal plate. This will increase the surface area and allow the detector to run 4
to 6 degrees colder. A colder detector will result in better energy resolution. As a rule, if the
correct heat sinking has been provided, the XR-100CR should NOT be warm to the touch.
6. RADIATION DAMAGE to the detector will occur if it is exposed to a high flux environment.
Synchrotron Radiation Beams should be modified with attenuators before they are allowed to strike
the detector or the fluorescence target. Damage to the detector will be permanent if the flux from
an X-Ray Tube, a strong nuclear radiation source, or an accelerator is not attenuated.
A RADIATION DAMAGED DETECTOR WILL NOT BE COVERED UNDER
WARRANTY.
7. PX2CR WARNING: The Amplifier and Rise Time Discriminator (RTD) inside the PX2CR box
have been carefully adjusted at the factory for maximum performance.
CHANGING THE SETTINGS TO THE AMPLIFIER AND RTD INSIDE THE PX2CR BOX
WILL VOID WARRANTY.
8. PLACE THE XR100CR AWAY FROM the PX2, and away from any computer terminal or CRT
monitor. Keep the XR100CR detector away from magnetic fields.

Amptek Inc. XR-100CR Manual
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This page blank.

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2 SYSTEM SPECIFIC PERFORMANCE
Replace this page with the graph for the specific detector and any other additional system specific
information.

Amptek Inc. XR-100CR Manual
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Blank page

Amptek Inc. XR-100CR Manual
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3 CONNECTION DIAGRAM: XR-100CR/PX2CR/MCA8000A (Figure 1)
Pocket MCA
MCA
8000A
AMP TEK
INPUT
GATE 1 GATE 2
I/O
SERIAL PORT
LEMO
XR100CR
POWER
AMP TEK
XR-100CR PX2CR
POWER SUPPLY
&
AMPLIFIER
AC POWER
ICR
PU GATE
TEST
AMP IN
AMP OUT
OUT IEC 320
BNC
BNC
LEMO
LEMO
PERSONAL
COMPUTER
DESKTOP
LAPTOP
HP200LX
DE9
-OPTIONAL-
COUNTER
-OPTIONAL-
PULSE
GENERATOR
DE9
BNC
BNC
BNC BNC
SERIAL PORT
CONTROL
and DISPLAY

Amptek Inc. XR-100CR Manual
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4 OPERATING NOTES FOR THE XR-100CR CONNECTED TO THE PX2CR
1. Turn the power to the PX2CR OFF.
2. Connect the 9-Pin D-Connector from the XR-100CR to the PX2CR.
3. Connect the Output of the XR-100CR (OUT) directly to the Input of the PX2CR (AMP IN) with
a BNC cable. DO NOT terminate the cable with a 50 termination.
4. Connect the Output of the PX2CR (AMP OUT) directly to the input of a Multichannel Analyzer
(MCA). DO NOT terminate the cable with a 50 termination.
5. Connect the +/- TEMP from the PX2CR to a µA meter.
6. Turn the AC power to the PX2CR ON via the rear panel switch.
7. Observe the µA meter. As the temperature of the cooler decreases, the µA meter will decrease
from 293 µA to about 250 µA. The temperature monitor IC provides 1 µA per 1°K. Please note:
room temperature = 293°K = 20°C.
NOTE:
Depending on the detector type, the internal temperature monitor could be a Diode sensor instead of an
IC sensor. If it is an IC sensor, the above instructions are valid. If it is a Diode sensor, please see
below.
For detectors with Diode temperature sensors:
The +/- TEMP MONITOR on
the PX2CR will be measured in
mV instead of A. The graph to
the right is used to cross
reference the mV reading to the
actual detector temperature in
degrees C.
If the PX2CR was ordered
together with a detector that has
a Diode temperature sensor, it
has been modified at the factory
to directly read in mV across the
(+ TEMP -) banana terminals.
This modified PX2CR is set at
the factory to provide 800 A of
current through the diode and
provide a TEMP reading in mV
only.
If a customer has both types of detectors with IC and Diode temperature sensors, the measurement can
still be made with a standard PX2CR that has not been modified exclusively for the Diode sensor. For
the IC operation, perform the A measurement as described in steps 5, 6, and 7 above. For Diode
operation, connect the two + and - terminals together with a banana shorting plug and measure mV
between the shorted + and - banana plug and the PX2CR chassis ground. Then cross reference the mV
reading to the graph in order to get degrees C.
XR100 Temperature Sensor Calibration
1N914 Lot #P1839244 I = 800uA
y = -0.4329x + 281.5
-65
-55
-45
-35
-25
-15
-5
5
15
25
590 610 630 650 670 690 710 730 750 770 790 810
mV
deg C
7/19/02

Amptek Inc. XR-100CR Manual
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8. Once the temperature has stabilized (about one minute), start taking data on the MCA. For
normal operation, there is no need to monitor the temperature. In order to avoid extraneous
noise pick-up into the detector, disconnect the +/-TEMP wires from the PX2CR. Just turn
the power ON to the PX2CR, wait a few seconds and start taking data.
9. The XR-100CR can be stimulated by either an X-Ray source or through the TEST input
connector. A positive (100 ns rise, 1 ms fall) test pulse of 20 mV will produce an output from
the XR-100CR roughly equivalent to a 20 keV X-Ray.
NOTE: For 5 mm2and 25 mm2 detectors (500 m thick) with internal collimators only:
Set the pulse generator to 4 Volts and the PX2CR GAIN to 2. This will produce an
output from the AMP OUT of the PX2CR of about 1 Volt.
10. Please Note: The standard PX2CR Shaping Amplifier has a "triangular" fixed shaping time
constant of about 12 µs, (see graph below). Optional PX2CR with 6 µs or 20 µs shaping time
constants are also available. An external NIM amplifier, compatible with a reset type
preamplifier, can also be used if other shaping time constants are desirable. Power to the XR-
100CR can be supplied through the PX2CR even if an external amplifier is used.
Pulse Widths:
12 s Shaper: 22 s
6 s Shaper: 15 s
20 s Shaper: 54 s

Amptek Inc. XR-100CR Manual
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5 RISE TIME DISCRIMINATION (RTD) IN THE PX2CR AMPLIFIER
A Rise Time Discriminator circuit has been implemented in the PX2CR amplifier. See Specifications
under THEORY OF OPERATION. When RTD is active (RTD switch up on the front panel), the
shaped pulses are internally gated and only pulses corresponding to "good" X-Ray events are allowed
to be sent to the MCA for analysis. The RTD internal threshold is set to about 2 keV. If energies less
than 2 keV are to be detected do not use the RTD function. The graph bellow shows the shape of the
output pulse when RTD is activated.
6 PILEUP REJECTION (PU) IN THE PX2CR AMPLIFIER
A PileUp rejection circuit has been implemented in the PX2CR amplifier. The PU Gate located in the
back panel of the PX2CR produces a positive TTL pulse. DO NOT terminate this signal with 50 .
The PU Gate should be connected to a device of impedance greater than 1 k .
For the duration of this gate, the Multichannel
Analyzer (MCA) must reject any detected
pulse. The PU Gate at the back of the
PX2CR (bottom trace in plot) also combines
the gate-off pulse to the MCA due to the reset
preamplifier (see next page).
When using the AMPTEK MCA8000 or
MCA8000A Multichannel Analyzer, the PU
Gate from the PX2CR should be connected to
GATE 1 of the MCA.

Amptek Inc. XR-100CR Manual
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7 INPUT COUNT RATE (ICR) IN THE PX2CR AMPLIFIER
The Input Count Rate (ICR) pulse (bottom trace in plot) is provided through a rear panel BNC
connector in the PX2CR amplifier. This pulse is produced from a fast low level discriminator which is
set just above the noise threshold of the XR-100CR preamplifier. The ICR pulse is a positive TTL
type with maximum duration of 2 µs. DO NOT terminate this signal with 50 . The ICR should be
connected to a device of input impedance greater than 1 k .
When connected to a counter, the ICR counting rate corresponds to the total number of X-ray events
that strike the detector. The ICR can be used together with the RTD and PU in order to calculate
absolute rates.

Amptek Inc. XR-100CR Manual
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8 XR100CR / PX2CR Reset Waveforms
1. Typical waveform at the output of the XR-100CR
2. Reset pulse at the output of the XR-100CR
3. Reset pulse at the output of the PX2CR. Use
PU GATE to gate-off the MCA (GATE 1 for
Amptek MCA8000A)

Amptek Inc. XR-100CR Manual
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9 XR-100CR / PX2CR TROUBLESHOOTING
The XR-100CR / PX2CR system has undergone extensive testing and burn-in before leaving the
factory. If the performance of the system is not similar to the one recorded at the factory before
shipping, please perform the following tests:
IMPORTANT:
AT ALL TIMES, BOTH CONNECTIONS FROM THE XR-100CR TO THE PX2CR AND FROM
THE PX2CR TO THE MULTICHANNEL ANALYZER (MCA), SHOULD BE MADE DIRECTLY
AND NOT WITH A 50 TERMINATION.
PLACE THE XR-100CR AWAY FROM THE PX2CR, AND AWAY FROM ANY COMPUTER
TERMINAL OR CRT MONITOR. KEEP THE XR100CR DETECTOR AWAY FROM MAGNETIC
FIELDS.
1. Remove all X-Ray sources. Turn RTD OFF.
2. Connect the XR-100CR output to the PX2CR input. Connect the PX2CR output to a high
impedance input (NOT THROUGH 50 ) of an oscilloscope. Look for periodic noise pick-up on
the scope by changing the time-base dial on the scope back and forth. If you find any periodic
signal on the scope (other than the Reset Waveforms), try to eliminate its source or place the XR-
100CR away from the pick-up area. Any periodic signal detected on the scope will degrade the
resolution of the XR-100CR.
3. If no periodic signal is present, and the system is still not performing as designed, proceed to the
next step.
4. Set the gain of the PX2CR to 6.60. Connect the output of the PX2CR directly to the input of a
good, wide bandwidth RMS Voltmeter. If the reading is between 50-60 mVolts RMS (for a
standard 7 mm2detector), the unit is normal. If the RMS reading is high and there is no periodic
pick-up signal at the output of the PX2CR, then the detector has been damaged.
CONTACT THE FACTORY FOR FURTHER ASSISTANCE AND RETURN PROCEDURES

Amptek Inc. XR-100CR Manual
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10 XR-100CR CONNECTION DIAGRAM WITHOUT PX2CR (Figure 2)
AMP TEK XR-100CR
TEST
(INPUT)
OUT
BNC
BNC
LEMO
SHAPING
AMPLIFIER
PULSE
GENERATOR
OSCILLOSCOPE SERIAL PORT
CONTROL and DISPLAY
PERSONAL COMPUTER
DESKTOP, LAPTOP,
HP200LX
PRE-AMPLIFIER
POWER SUPPLY
+/- 9 VOLTS
DUAL TRACKING
DETECTOR
BIAS SUPPLY
0-110 VOLTS, 10uA
VARIABLE
COOLER POWER
Typical for 1-stage cooler
I = 0.8 A
V = 1.4 V
Typical for 2-stage cooler
I = 0.350 A
V = 3.5 V
TEMP MONITOR
0 to 400 µA for IC - AD590
0.5 V to 1 V for Diode
Pocket MCA
MCA
8000A
AMP TEK
INPUT
DE9
I/O
SERIAL PORT

Amptek Inc. XR-100CR Manual
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11 OPERATING NOTES FOR THE XR-100CR WITHOUT THE PX2CR
11.1 Equipment Required
1. Power Supplies
i. A dual tracking +/-9 VDC @ 35 mA with voltage meter & current limit.
ii. A zero to +3 VDC @ 0.7 A adjustable with voltage and current meter.
iii. A zero to +110 VDC adjustable @ 10 µA.
1. A zero to 400 µA DC meter with high input impedance (>1000 M ).
2. Shaping amplifier such as NIM standard Shaping Amplifier with an input impedance of 1 k .
A "triangular" type of pulse with 12 µs shaping time and base line restoration will be needed
to realize the resolution of the XR-100CR. Example: Canberra Model 2025 or 2026.
3. Oscilloscope
4. A low energy radioactive x-ray source or tail pulse generator.
5. AC power outlet strip (preferably with surge suppression & EMI/RFI filtering).
11.2 Absolute Maximum Ratings
Cooler power.............+0.7 AMPS
Preamp power...........+/- 9 VOLTS
Detector Bias (HV)....+110 VOLTS
11.3 6-Pin Lemo Connector on the XR-100CR (Lemo Part# ERA.1S.306.CLL)
Pin 1: Temperature Monitor
Pin 2: + H.V. Detector Bias, +110 Volt max.
Pin 3: -9 Volt Preamp Power
Pin 4: +9 Volt Preamp Power
Pin 5: Cooler Power Return
Pin 6: Cooler Power (0 to +2.1 Volt @ 0.7 A max.)
CASE: Ground and Shield
11.4 9-Pin Cable D-Connector to PX2CR or External Power (standard 9-Pin D)
Pin 1: +9 Volt Preamp Power
Pin 2: -9 Volt Preamp Power
Pin 3: 0 to +2.1 Volt Cooler Power @ 0.7 A max.
Pin 4: + 9 Volt Temperature Monitor Power
Pin 5: + H.V. Detector Bias, +110 Volt max.
Pin 6: Ground and Case
Pin 7: Cooler Power Return
Pin 8: Ground and Case
Pin 9: Ground and Case
11.5 Connections and Turn-On Procedure (see figure 2)
1. Turn all power supplies OFF. Plug all equipment to be used into one common AC power outlet
strip. This will help prevent ground loops, which is crucial in getting good performance from
the XR-100CR.
2. Set voltages on all power supplies to ZERO. Set current limits on all power supplies to ZERO.

Amptek Inc. XR-100CR Manual
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3. Connect the LEMO CONNECTOR cable to the XR-100CR. Apply power to the XR-100CR
through the D-CONNECTOR end of the cable according to Figure 2 and the Pin assignments
given above in the manual.
4. Turn ON the +/-9 VDC power supplies to power the charge sensitive preamplifier. Verify that
both the + and - Volt outputs are between 8 and 9 Volts. NEVER EXCEED 9 VOLTS.
Increase the current limit on the power supplies as required so that it can just obtain this output
voltage but will not allow any excessive current to flow.
5. Set the High Voltage Supply to zero. Slowly increase voltage to be between +35 and +45
volts.
6. Attach the OUTPUT of the XR-100CR to the INPUT of the shaping amplifier. A BNC
connector is provided on the rear panel of the XR-100CR. The output pulses of the XR-100CR
are NEGATIVE. A NIM standard shaping amplifier compatible with a reset type preamplifier
and an input impedance of 1 k can be used. A shaping time constant of 12 µs or longer and
"triangular" shaping with Base Line Restoration is optimum for this detector.
7. Attach the OUTPUT of the shaping amplifier to an oscilloscope. Observe that the output of the
shaping amplifier is random noise. Make sure there is no repetitive signal such as the power
line frequency or any type of RF signal. Any repetitive signal observed can be traced to ground
loops or RFI generated from equipment such as computer monitors. If any repetitive signals
are present, other than the “Reset Waveforms” described earlier in the manual, the performance
of the XR-100CR will degrade significantly.
8. If the testing is to be done with a radioactive source, remove the red protective cover from the
detector of the XR-100CR. Place the radioactive source in front of the AXRCR detector.
9. If a pulse generator is to be used, connect the OUTPUT of the pulse generator to the BNC
TEST input of the XR-100CR. Set the test pulse generator to produce a 20 mV peak signal at a
frequency of about 1 kHz. The rise time of the signal should be about 100 ns and the pulse
width should be for about 1 ms. This will produce a pulse out of the XR-100CR equal to
approximately a 20 keV X- ray event. Observe pulses on the oscilloscope.
NOTE: For 5 mm2and 25 mm2detectors (500 m thick) with internal collimators only: Set
the pulse generator to 4 Volts. Set the PX2CR GAIN to 2. This will produce an output
from the AMP OUT of the PX2CR of about 1 Volt.
10. Connect the + terminal of the temperature monitor µA meter to the + 8 Volt supply through a
10 k resistor. See Figure 1. Connect the - terminal of the meter to Pin 4 of the D-Connector
in order to power the temperature monitor circuit. Observe that the reading in µA is
approximately the room temperature in degrees KELVIN. (i.e. 300 µA corresponds to 300 K
room temperature)
11. While observing the µA meter, slightly increase the cooler supply current until the temperature
reading starts to change on the µA meter. Observe that the temperature is DECREASING. If
the temperature increases, turn OFF the power supply and check the polarity of the cooler
power wires. If the temperature is decreasing, increase the +3 V supply while observing the
current. The current should be between +650 and +700 mA. The temperature displayed on the
µA meter should decrease to about 250 K.
12. THE COOLER IS FRAGILE AND WILL BE PERMANENTLY DAMAGED IF
EXCESSIVE CURRENT OR IF REVERSE POLARITY IS APPLIED. THE WARRANTY
WILL BE VOID IF THE COOLER IS DAMAGED DUE TO EXCESSIVE CURRENT OR
REVERSE POLARITY.
13. The temperature sensor has an offset associated with it. It is quite linear but it could have an
offset of about 5 degrees Kelvin.

Amptek Inc. XR-100CR Manual
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14. Also, once the temperature on the AXRCR gets below -10 °C the performance of the XR-
100CR system will not change with a temperature variation of a few degrees. Hence, accurate
temperature control is not necessary.
15. Increase the + H.V. supply to + 100 Volts. Now the XR-100CR is fully operational.
16. ALWAYS INCREASE THE + H.V. POWER SLOWLY TO PROTECT THE INPUT FET.
WHEN TURNING OFF THE XR-100CR, DECREASE THE + H.V. SLOWLY TO ZERO
VOLTS BEFORE TURNING OFF THE XR-100CR. IF THE FET IS DAMAGED DUE TO
HIGH VOLTAGE TRANSIENTS, THE WARRANTY WILL BE VOID.
12 PROCEDURE TO LOWER THE HIGH VOLTAGE BIAS IN THE
DETECTOR
If the detector starts to breakdown or becomes noisy, it is probably the result of increased leakage
current which may occur after exposure to accumulated radiation. The exact reason and the total
radiation that will cause this increase of leakage current in the detector is very complex since it
depends on the energy spectrum and intensity of radiation the detector was exposed to. Lowering the
High Voltage bias from the factory set +100 Volts to 80-90 Volts can reduce the detector leakage.
Please follow the instructions below:
Refer to the “Power Supply Schematic” (figure 3) included in this manual. Unplug the PX2CR from
AC power. Unplug the XR-100CR from the PX2CR. Open the PX2CR by removing the two screws
from the bottom of the case. Locate the D3 and D4 zener diodes on the PX2CR mother board just
below the input AC filter. Unsolder one of the connections on D3 or D4 so that no connection from
R16 to ground is made. These two zener diodes set the high voltage to the detector. By removing the
connection to ground the voltage is now set by the Potentiometer R5.
Turn POWER ON.
CAUTION: HIGH VOLTAGE AND AC LINE VOLTAGE ARE PRESENT. DO NOT TOUCH
ANYTHING INSIDE THE PX2CR WITH BARE FINGERS. USE AN INSULATED
SCREWDRIVER AND TEST LEADS.
With a high impedance voltmeter (>1000 M ) measure the detector bias voltage from the outside of
the PX2CR at the 9-PIN D-Connector between Pins 5 and 8. It should be about +100 Volts. If a high
impedance voltmeter is not available, use a standard 10 M input impedance meter and measure the
voltage at the HVM point just next to R5.
Potentiometer R5 is located on the motherboard of the PX2CR in the back just below the AC input
filter. This potentiometer adjusts the high voltage to the detector. With an INSULATED screwdriver
turn the potentiometer's screw counter-clockwise to reduce the voltage to the detector by about 10
volts. Turn the R5 screw counter-clockwise to set the voltage to +90 Volts. Plug in the XR-100CR.
Each time R5 is turned by 1/2 turn check to see if the detector is restored to normal. High voltage to
the detector can be decreased by more than 10 volts as long as the resolution of the detector is
acceptable.
If this procedure succeeds, operating the detector at the highest voltage below +100 Volts without
breakdown is recommended. Once a new stable high voltage level has been established zener diodes
D3 and D4 should be replaced with new zeners equal to the new high voltage. If new zeners are not
available, leave the zener connection to ground open and operate the PX2CR temporarily without the

Amptek Inc. XR-100CR Manual
- 18 -
zeners. Note that if the input AC line varies too much at your location you might find the detector high
voltage to be unstable without the zeners.
NOTE: The 25 mm2and 5 mm
2(500 m thick) detectors require a normal high voltage bias of
between +130 to +150 Volts.
13 WARRANTY
AMPTEK, INC. warrants to the original purchaser this instrument to be free from defects in materials
and workmanship for a period of one year from shipment. AMPTEK, INC. will, without charge, repair
or replace (at its option) a defective instrument upon return to the factory. This warranty does not
apply in the event of misuse or abuse of the instrument or unauthorized alterations or repair.
AMPTEK, INC. shall not be liable for any consequential damages, including without limitation,
damages resulting from the loss of use due to failure of this instrument. All products returned under
the warranty must be shipped prepaid to the factory with documentation describing the problem and
the circumstances under which it was observed. The factory MUST be notified prior to return
shipment. The instrument will be evaluated, repaired or replaced, and promptly returned if the
warranty claims are substantiated. A nominal fee will be charged for unsubstantiated claims. Please
include the model and serial number in all correspondence with the factory.
13.1 Technical Questions
For all technical questions, please contact the factory via
PHONE: [phone]
FAX: [phone]
Email: <[email protected]>
www.amptek.com

Amptek Inc. XR-100CR Manual
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14 INTERNAL CONNECTIONS BETWEEN AXRCR / XR-100CR / PX2CR
1
2
3
4
5
9
8
6
11
10
7
12
TEMPERATURE
SENSOR
AD590
ELECTRIC
COOLER
THERMO-
FEEDBACK
PREAMP
FILTER
1
2
3
4
5
6
1
2
3
4
5
6
7
8
9
SHAPING
AMP
GND
GND
GND
-9 VDC
+9 VDC
BIAS
COOLER-
COOLER+
TEMP
.
DETECTOR
FET
Cf = 40 f F
Ctest = 40 f F 50 ohm
THERMAL SW.
9 PIN D
CONN.
LEMO
CONN.
XR-100CR PX2CR
AXRCR
OUT
TEST
POWER
IEC 320
AMP
OUT
AC IN
X-RAYS
Be
CASE
ICR
PU
GATE
RISE-
TIME
DISC.
12 11 10
4 5 6
1
2
3
9
71
23
4
5
6
8
5 4 3 2 1
9 8 7 6
9 position DLemoTO-8
Top View End View Front View (female)

Amptek Inc. XR-100CR Manual
- 20 -
15 PX2CR FRONT AND BACK PANELS
PX2T/CR Front Panel
PX2T/CR Back Panel
To change selected voltage: Remove fuse cartridge using a small blade screwdriver or similar
tool; select desired voltage by matching arrow on fuse cartridge with indicator located on bezel
(lower left corner); replace fuse cartridge making sure the desired voltage arrow aligns with the
indicator.
MODEL PX2T/CR POWER SUPPLY & AMPLIFIER
FOR THE XR-100T/CR Si DETECTOR
+ TEMP -
MONITOR POWER
GAIN
XR100T/CR
AMP TEK
A
MP IN
A
MP OUT
RTD
PU GATE
MODEL# PX2T-CR
SERIAL # 000
AMPTEK INC.
6 De ANGELO DR.
BEDFORD, MA 01730 U.S.A.
ICR
o
_
14 DEANGELO DR.