A New VME Based High Voltage Power Supply for Large Experiment Detectors, but concurrently able to produce lower power requirements via modular voltage-pods (ranging from 0V to at least 5.5kV) in a computer controlled environment.
FEATURES
VME, 6U, 3-Wide, 8 independent channels w/
interchangeable voltage pods
INTERNET & other interface software
drivers require development
9 pod varieties
+/- 5.5kV max. @ 2mA, 1mA & .1mA
+/- 2.0kV max. @ 3mA
- 10. V max. @ .1mA
can create other 100% drop-in compatible pods
Extremely low voltage ripple
Variable ramp rates
Advanced histogram and graphic functions
Monitors the voltage & current of the supply (and a running time
history of current drawn)
Module temperature monitoring
Completely computer controlled unit (PC software available)
APPLICATIONS
Supply voltage for detectors
Many Laboratory power requirements
Use with Bi Ra's ethernet/INTERNET System (eBIND box) and have
Universal I/Os.
GENERAL DESCRIPTION
The Model VME4877 is a triple-width VME module used to supply HIGH DC
voltage to detectors in a modular, upgradable, computer controlled
environment. This 8 channel module with its interchangeable pods has
12-bit setting resolution and extremely low voltage ripples. Computer
control has allowed many special features to be developed for the
supply, including user-defined control and monitor groups,variable
ramp rates, and advanced histogram and graphic features. This 6U unit
can be used independently or in a large system. In both cases, a
special J2 backplane is required. The system is designed to the
VME-bus standard with up to 48 supplies per standard VME crate.
The 12-bit setting resolution is stable with acceptable voltage ripple levels of less than 100 mV rms affrequencies less than 1 kHz and less than 10 mV rms at higher frequencies.Computer controlled monitoring is achieved via 15-bit ADCs resulting in least count sensitivity of (full scale/32,768) for voltage and current on all pods.
The HV supplies were designed to be as simple as possible with complete computer control and monitoring that incorporates many special features. For example, a common ramp rate can be defined in a group and a maximum difference voltage between any two supplies in the group can be set. The computer monitors the voltage and current of the supply (keeping a running time history of current drawn) as well as the temperature of the module and the values of the low voltage supply voltages. Variable ramp rates and user defined supply groups are other software features. PC software is available which uses a popular commercial PC/VME interface.