FEATURES

• Very low noise design: less than 260 ion pairs RMS at 20 pF
• High count rate capability: 1 x 10-5 Coulomb/s
• Fast risetime: less than 15 nsec at 0 pF, 60 nsec at 300 pF

APPLICATIONS

• Low energy X-Ray analysis
• other general purpose use

DESCRIPTION
The PCP-5 is a charge sensitive preamplifier for use with Proportional Counter Detectors. The PCP-5 converts the ionisation charge from the Proportional Counter to pulse whose amplitude is proportional to the charge collected by each event. The output of the PCP-5 is compatible to any Spectroscopy Amplifier available in the NIM line of modules.

SPECIFICATIONS
INPUTS
Detectorinput: positive or negative charge pulse up to 5 x 10-9 Coulomb ( 3 x 1010 Ionpairs ) and provides HV bias to the detector
Testinput: positive or negative pulse
High Voltage Input: For detector bias of up to +-3kV
OUTPUTS
Energy Output: Inverted pulse with fast risetime and slow fall time, maximum amplitude +-7.5V, impedance 50 Ohms. ( risetime 15 nsec at 0 pF, 60 nsec at 300 pF; falltime approx. 100 usec)

PERFORMANCE
Integral Nonlinearity: less than 0.1% for up to +-4V output.
Stability: less than 0.01%/oC
Noise at 20 pF: < 4 x 10-17 Coulomb RMS (260 Ionpairs RMS)
Open loop Gain > 50.000
Sensitivity: approx. 1V/10-12 Coulomb/sec (0.16 uV/Ionpair)
Countrate capability: 1 x 10-5 Coulomb/sec
( 6 x 1013 Ionpairs/sec)

CONNECTORS
Detector Input: MHV ( SHV on request ) Test Input, Energy Output: BNC
HV-Input: SHV
Power: 9-pin D-sub connector
A 3m power cable is supplied with the PCP-5
POWER REQUIREMENTS
+12V 30 mA, -12V 20 mA
PHYSICAL
Size: 11 x 6 x 3.4 cm
Net weight: 0.3 kg
Shipping weight: approx. 0.6 kg