Tasks to be done for 120kV source

We are testing the beam dynamics of the LIS if the ion beam extraction potential is raised to 120kV. Simulations show that space-charge is much less important at this energy. In addition some modifications to the extraction geometry give an improved beam emittance from the source.

Present Status

Source is up to 115kV (with -10kV on puller). Measurements have been made after the source and after the ion beam focusing, with good results. The first results indicate a definite improvement over 60kV. The source has held 120kV for a very short time.
First shots were taken with the current captured in a 40 mm aperture cup, at 80kV (source) and -10kV (puller).

Task Respon. Status
Internal electrode changes (mech) Rich, Gavin, Brian, OlivierMounted.
New support for target chamber Brian Mounted.
New supports for extraction Brian Mounted.
Breakdown protect of ceramic Brian Finished and installed.
Shorting solenoid Chris. + Brian Finished
Electrical scheme for sh. sol. Chris. + Mike + Rich Finished and installed
Simulation of scheme Gavin, Klaus and RichFinished, waiting for measurement results.
Re-cabling of source HV units Chris. + Richard Finished.
Diagnostics Gavin Faraday cup mounted.

Some Other Useful Documents

back to home...   prepared by Richard Scrivens 28th June 2000