CTA09 Proposed R&D Topics for the Remainder of the CesrTA Program
Session: 1
Conveners: K. Harkay, Y. Suetsugu, R. Zwaska
Topics: EC Build-up and Mitigation I and II
R&D Class
R&D Task Description Pre-requisites Deliverables
EC Build-up Characterization of SE - Data for EC dynamics
Define beam measurements simulation
that provide input for SE
parameters
EC Build-up Define and carry out Data for EC dynamics
experiments to determine PE simulation
properties, analyze data
EC Build-up Guidebook for understanding Data for EC dynamics
and using SEY and simulation
parametrizations
EC Build-up Measurement and analysis of RFA in Data for EC dynamics
EC in quadrupole quadruple simulation
EC Build-up In-situ SEY characterization Data for EC dynamics
with ECLOUD1 (Al, Cu, SS, simulation, mitigation
coatings)
EC Build-up Surface conditioning - Beam Enough Data for EC dynamics
studies and analysis of operation time simulation
surface conditioning (SS, Cu,
Al, coatings) (time evolution)
EC Build-up EC lifetime measurement with Periodic Data for EC dynamics
witness bunches; find SEY @ Measurements simulation
E=0; time evolution
EC Build-up Multipacting threshold bunch Data for EC dynamics
current (PE vs SE dominated) simulation
(vs. vacuum pressure rise?)
EC Build-up Carry out machine studies to Material choice Data for EC dynamics
compare component surfaces of DR simulation
(SS, copper, Al, etc.)
RFA Modeling of RFA as part of Incorporate RFA
the EC system (resonance model into buildup
due to SE from grid) codes
RFA Estimation of electron density RFA modeling Evaluation of electron
density
RFA/ TE Wave Correlate RFA with TE wave Calibration of Validation of
measurement in drifts and TE wave instrumentation
bends measurement
TE wave TE wave vs. resonant BPM;
time resolved
RFA/ TE Wave Devise a plan for correlating Calibration of Validation of
RFA with TE wave TE wave instrumentation
measurements in a wiggler; measurement
time structure (EC at BY=0
has longer lifetime)
Instrumentatio Investigate shielded electrode New instrumentation
n for wiggler measurements or possibility
other
Mitigation Determine best techniques for
general mitigation strategy
Mitigation Mitigation in wiggler: Cu New wiggler
Groove (TiN coated) beam pipe
Mitigation Mitigation in wiggler: Clearing New wiggler
electrode beam pipe
Mitigation Mitigation in straight: Enamel New beam pipe
electrode
Mitigation Long term reliability of Enough
electrodes and coatings operation time
Mitigation Alpha-carbon SPS
Mitigation NEG coating
Mitigation Mitigation in wiggler: Enamel New wiggler
electrode beam pipe
Mitigation Solenoid field
Mitigation Beam pipe with photon
absorption (roughness), PE
trapping
Mitigation Beam pipe with antechamber
*R&D Classifications: eg, LET, Instrumentation, RFA, TE Wave, EC Simulation, xBSM, Other
†Priority Classifications: Critical, Very High, High, Moderate, Low
‡Specify first run period when measurement can be accomplished or nominal date when simulations/analysis could be made available.
srTA Program
Priority† Participants Target Date‡
Critical C. Celata, J. 2009/12
Crittenden,
others
Critical G. Dugan, D. 2009/12
Sagan, K.
Harkay, J. Livezy
Very high M. Furman, G. 2009/12
Rumolo
Very high K. Kanazawa, Y. 2009/12
Li
Very high S. Greenwald, R. 2010/3
Zwaska, others
High R. Zwaska, J. 2010/7
Livezey, others
High Cornell team 2010/3
Moderate Cornell team 2010/3
Moderate Cornell team 2010/7
Critical J. Calvey, M. 2009/8
Venturini
Very high K. Kanazawa 2009/12
Very High S. De Santis, J. 2009/8
Sikora, (N. Eddy,
CY Tan)?
Very high S. De Santis, J. 2010/3
Sikora
High S. De Santis, J. 2010/3
Sikora
Moderate S. De Santis, J. 2010/3
Sikora, M.
Billing, M.
Palmer
Critical Y. Suetsugu, M. 2010/3
Pivi
Critical M. Pivi, Y. Li 2009/8
(2010/3)
Very high Y. Suetsugu, 2009/12
Cornell team
Very high B. Zwaska 2009/12
High M. Palmer 2010/3
High “CERN” 2010/3
Very High M. Pivi 2010/3
Moderate B. Zwaska 2010/3
Moderate 2010/7
Moderate 2010/3
Low 2010/7
ould be made available.