Features

• Complete programmability within the Genie™ family
• Utilizes the CANBERRA Instrument Control Bus (ICB)
• Regulated up to ±2000 V dc, 1 mA output
• Noise and ripple <3 mV peak to peak
• Overload and short circuit protected
• Overload, inhibit and polarity status indicators
• Inhibit and overload latching circuits
• Ramped high voltage output with bar graph indication
• Secure computer operation without conflicting front panel controls

Description

The CANBERRA Model 9641 High Voltage Power Supply is a single-width NIM family member of the Instrument Control Bus (ICB) line of programmable front end electronics. It has been designed primarily for use with photomultiplier and electron multiplier tubes. The Model 9641 accepts programming information over the 8-bit wide CANBERRA bus standard called the ICB. By design, the Model 9641 will accommodate any detector requiring a bias voltage up to 2000 V and a current level of 1 mA or less.

The Model 9641 allows the user to select from two outputs, one ranging from ±15 to ±2000 V dc and the other derived from the first but attenuated by a factor of 10 giving ±1.5 to ±200 V dc. A 20-segment bar graph displays the output voltage. In addition, this unit allows the user to select the output voltage polarity with an internal control.

The Model 9641 can withstand any overload or short circuit for an indefinite period of time. The unit can be programmed to either resume normal operations after removal of the fault or to require a programmed reset command.

An INHIBIT input is available for remote shutdown of the Model 9641. The unit can be programmed to either resume operation upon removal of the INHIBIT signal or to require a programmed reset command.

ICB NIMs connect to this bus via a host module such as the Model 556A Acquisition Interface Module (AIM) as part of a hierarchy of networked acquisition and control managed by a Genie family computing platform.

Most adjustments are made through the graphical user interface of the Genie software environments. Equivalent batch procedure commands are also available in the environments. All ICB NIM parameters are stored in the single data file structure of the Genie family, allowing verification of correct set up from one experiment to the next.

All ICB NIMs feature a characteristic READY LED to indicate operational status.