STJ Quick Start Guide v 2.01
April 1, 2021
Page 3
OVERVIEW OF THE SYSTEM
The typical STJ system includes a cryostat with STJ detectors and associated control equipment provided
by a 3
rd
party combined with the following equipment provided by XIA:
•
Commercial PXI interface and crate, containing:
o
MPX-32D 32-channel digitizer module(s)
•
Custom crate + ultra-low noise voltage regulators, containing:
o
STJ Analog 32-channel preamplifier module(s)
o
STJ I/O module, which includes an STJ input override switch
•
Linear voltage supply module that provides power to the custom crate
•
Associated interconnecting cables
MPX-32D DIGITIZER MODULE
XIA’s MPX-32D is a 32-channel digitizer and modular pulse-processor that resides in a computer-
controlled PXI crate. Its primary function is to measure pulse-heights, i.e. event energies.
Fig 1: MPX-32D 32-channel digitizer and modular pulse-processor
INPUTS AND OUTPUTS
Name
Connector Type
Description
Analog Inputs 0-15
SAMTEC
VRDPC-50-01-M-
RA
16 differential-pair analog inputs
