Scientific

UV Source - UVS 200

Differentially Pumped, High Performance, Ultraviolet Source for Surface Analysis Applications

UPS - Ultraviolet Photoelectron Spectroscopy

Features:

• UHV Mounting
• Air cooled, UV-source, Water-Cooling NOT Required
• High Flux >8 x 10¹⁵ Photons sr^-1 s^-1
• High intensity photocurrent between 15 nA .. 40 nA
• Stable output of adjustable ratio of Helium I and Helium II lines
• Easy operation / ignition / adjustment
• Differential pumping
• Port aligner for convenient beam positioning
• Mounting flange: 2.75"OD (NW35CF)
• Bakeable up to 250° C
• Optional: leak valve / gas inlet system / pumping system / polarizer

For Ultraviolet Photoelectron Spectroscopy on solids (UPS), the high performance Ultraviolet Source UVS 200 is ideally suited. The design of the discharge chamber results in high intensity and it also facilitates easy ignition and extremely stable operation of the discharge. The UVS 200 can be mounted to any 2.75"OD flange on an analysis chamber as flange-to-sample distances are not critical. The source is differentially pumped via the beam guide capillary (two pumping lines). This efficient pumping also ensures a long operating life. The He I / He II ratio can be controlled by adjusting the pressure of the discharge. The discharge capillary is air-cooled by a fan. When the fan is removed the source can be baked to 250°, allowing true UHV operation. Helium is normally used as operating gas but Neon and Argon may also be used.

UV Source Pumping Schematics

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UV Source Controller UVC 200

• Remote Control: 2 Analog Inputs, 2 Monitor Outputs, TTL Input Signal

• Regulated Constant voltage for Initial Ignition

• Regulated Constant Current Operational Mode

• Operating voltage: 0-1500 V, Operating Current: 0-125 mA, Ignition Voltage: 6500 V
  

• Controls for Voltage and Current and Push Button for Start
• 3 1/2 digital panel, two display modes (V or mA)
• LEDs for voltage / current / fan fail and HV fail
• 115/230 V, 200VA, 50-60 Hz