Minutes of the CLIC Meeting - 24 August 2007
Agenda:
|
Main Results of the Test of the 30CNSD1P2CU
Structure
First Results on RF- Breakdown Measurements
Positive Ion Current - Hot Coulomb Explosions?
|
Speakers:
|
Alberto Rodriguez
Jan Kovermann
Magnus Johnson, Uppsala University
|
Main Results of the Test of the 30CNSD1P2CU Structure
The high power test of the 30CNSD1P2CU structure was finished a few
weeks ago. The results of the measurements and its relative
performance respect to other Cu structures will be discussed.
copy of
Alberto's
transparencies (
pdf
format)
First
Results on RF- Breakdown Measurements
First results of RF-breakdown
measurements will be presented, this includes imaging of the breakdown
event and comparison of image data with control system data and
possible correlations with ion currents.
copy of Jan's
transparencies (pdf
format, PowerPoint format (movie included)
14Mb )
Positive
Ion Current - Hot Coulomb Explosions?
RF-breakdowns in accelerating
structures have been observed to be accompanied by a fast burst of
negative particles (electrons, ns scale), and a slower burst of
positive particles (possible ions, us scale). One possible source of
the slow ion burst is a hot coulomb explosion. A theory which predicts
the arrival time spectrum of particles from such an event has been
derived. Previously taken data from CTF have been fitted to this
theory. Current and future measurements of the ions are discussed.
copy of
Magnus's
transparencies (
pdf
format)
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Frank
Tecker - Last updated 29-08-2007