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Flying Wire & IPM Update. 12/3/2009. IPM Work. IPM Design Studies for a second Mark –II for Main Injector and Booster have begun. Tev IPM teaching session degenerates into another onion layer being pealed away. We found two additional subtle issues. Tev IPM Issue Fixes.

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Presentation Transcript

Ipm work
IPM Work

  • IPM Design Studies for a second Mark –II for Main Injector and Booster have begun.

  • Tev IPM teaching session degenerates into another onion layer being pealed away. We found two additional subtle issues.


Tev ipm issue fixes
Tev IPM Issue Fixes

  • The QIE chip is a piecewise linear device. The conversion to real numbers from the QIE data was originally done by the LabView code but this function was moved to the buffer board but the bit to do this inadvertently was not set.

  • The source of fluctuating signal levels and is not necessarily the vacuum. It’s mostly the Clearing Field charge time. We do see an occasional vacuum burst.


Tev ipm stages
Tev IPM Stages

Before

After Both QIE and HV Delay Fixes

QIE Piecewise Linear Fix


Tev ipm measurements after
Tev IPM Measurements After

Measurement Consistency


Tev ipm and pbj measurement
Tev IPM and PBJ Measurement

Measurement Before fixes

PBJ and IPM Plot after both


Flying wire status
Flying Wire Status

Main Injector

Horizontal Operational

Vertical has been replaced this morning. Waiting for beam. New lid with brand new feed through installed. Pumped down, let up, inspected, and pumped down again.

Recycler: No Change

Horizontal Operational

Vertical has a binding feed-through. Problem is inside.

Wire mounted on lid at E4R

TEV: No Change

All 3 wires are operational.


Booster ipm notes
Booster IPM Notes

Has

Horizontal and Vertical Operational

Electrostatic collection of Ions with 8KV Clearing Field

Need to be Determined

Looking at Magnetic containment for collection of Electrons as in the mark-II in MI.

Probably will NOT use MI style electrostatic cans

(Mig-Jen Has looked at 8 GeV beam and determined that some oscillations are not seen well electrostatically at Q102. Needs more study.)

Why

Space Charge effects at 8GeV dominate at extraction.

Can use magnets to contain electrons.

(Has been modeled by Alan Hahn and Andreas Jansson

but should be updated.)


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