Model 3603 | -30 kV SEM Power Supply

• Three outputs in compact enclosure
•    -30 kV @ 330 uA accelerator
•    -1 kV @ 25 uA Wehnelt
•    5 Vdc @ 3 A floating filament
• Input voltage 24VDC
• USB or RS-232 remote control
• Demo program with source code
• Interlock input and status LED's
• Standard federal output connector

Within this compact 25 x 12 x 20 cm enclosure are three common power supplies used by scanning electron microscopes. The filament and Wehnelt voltages are floating on the accelerator voltage. All three are remotely programmable via an RS-232 or USB data port. Connection to a SEM are through a conventional 3-pin Federal connector. A plug-in terminal block connects 24VDC input power, an external safety interlock, and an HV On status bit.

Two status lights show serial communication activity and a heartbeat lamp indicates the 3603's processor is active.

The Wehnelt voltage is derived from the bias supply.

A C-language demo program allows controlling all supplies and reports communication activity. It displays the set-point of each supply and the actual measured outputs. An internal temperature sensor is also displayed.

3603 Block Diagram

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