Ionization Chambers in the FLASH Dump Line

Ionization Chambers in the FLASH Dump Line

Nicoleta Baboi, Petr Smirnov

FLASH Seminar, DESY Dec. 7, 2010

N. Baboi, MDIN. Baboi, MDI FLASH Seminar, Dec. 7, 2010FLASH Seminar, Dec. 7, 2010

ContentsContents

•Overview of Dump Line Diagnostics

•Ionization Chambers� Characteristics� Operational experience

•Summary

N. Baboi, MDIN. Baboi, MDI FLASH Seminar, Dec. 7, 2010FLASH Seminar, Dec. 7, 2010

BPM13DUMP

Dump Line Upgrade 2009Dump Line Upgrade 2009

BPM9DUMP

BPM5DUMP

Toroid9DUMP

OTR screen9DUMP

BLM14DUMP

BLM13.1DUMP13.2DUMP

BLM9DUMP

BLM6DUMP

BLM1.1DUMP1.2DUMP

BPM10DUMP

BPM16DUMP

8 x BHM16DUMP

BLM14R.DUMP14L.DUMP14U.DUMP14D.DUMP

Ionization ChambersI14R.DUMPI14L.DUMPI14U.DUMPI14D.DUMP

N. Baboi, MDIN. Baboi, MDI FLASH Seminar, Dec. 7, 2010FLASH Seminar, Dec. 7, 2010

Dump ChamberDump Chamber

BPM

for glass fibres

for glass fibres

for ionizationchambers

for ionizationchambers

» T. Wohlenberg, M. Schmitz, MDI3

» T. Wohlenberg, M. Schmitz, MDI3

magnetic-coupled

BPM

magnetic-coupled

BPMBHMBHM

N. Baboi, MDIN. Baboi, MDI FLASH Seminar, Dec. 7, 2010FLASH Seminar, Dec. 7, 2010

Ionization ChambersIonization Chambers

� 4 air filled 3/8“ Heliax HF cables� measures O2-

� electronics → large dynamicrange: 10-4 .. 104 µA

� test measurement in FLASHpreviously to installationin DUMP line

� slow (not bunch by bunch)

N. Baboi, MDIN. Baboi, MDI FLASH Seminar, Dec. 7, 2010FLASH Seminar, Dec. 7, 2010

Glass fibers (BLMs) andIonization Chambers DisplayGlass fibers (BLMs) and

Ionization Chambers Display

Vout is displayed

Will change to I !

N. Baboi, MDIN. Baboi, MDI FLASH Seminar, Dec. 7, 2010FLASH Seminar, Dec. 7, 2010

Ionization Chambers (2)Ionization Chambers (2)

200 bunches/pulse

short pulse

voltage (not current) displayed in DOOCS

N. Baboi, MDIN. Baboi, MDI FLASH Seminar, Dec. 7, 2010FLASH Seminar, Dec. 7, 2010

SummarySummary

•Installed in last 2 meters of dump-line

•Contributed to successful run with high current and long pulse trains in Sep. 2009

•Will change display to show I instead of V���