Abstracts Brochure - CERN

TUPCH — Poster Session 27-Jun-06 16:00 - 18:00
High Pressure RF Cavities in Magnetic Fields
A study of RF breakdown in pressurized cavities
immersed in strong magnetic fields has
begun as part of a program to develop RF
cavities filled with dense hydrogen gas to be
used for muon ionization cooling. A pres-
R.P. Johnson, M. Alsharo’a, P.M. Hanlet, R. E. Hartline, M. Kuchnir,
K. Paul (Muons, Inc) C.M. Ankenbrandt, A. Moretti, M. Popovic, K.
Yonehara (Fermilab)
surized 805 MHz test cell is being used at Fermilab to compare the conditioning and breakdown behavior of copper,
molybdenum, and beryllium electrodes as functions of hydrogen and helium gas densities and magnetic field strength.
These results will be compared to the predicted or known RF breakdown behavior of these metals in vacuum with
and without external magnetic fields.
201 MHz Cavity R&D for MUCOOL and MICE
We describe the design, fabrication and preliminary
testing of the prototype 201 MHz
copper cavity for a muon ionization cooling
channel. Application of the cavity includes
the Muon Ionization Cooling Experi-
D. Li, S.P. Virostek, M.S. Zisman (LBNL) A. Bross, A. Moretti, B.
Norris (Fermilab) J. Norem (ANL) H.L. Phillips, R.A. Rimmer, M.
Stirbet (Jefferson Lab) D.J. Summers (UMiss) Y. Torun (IIT)
ment (MICE) as well as cooling channels for a neutrino factory or a muon collider. This cavity was developed by the
US MUCOOL collaboration and is being tested in the MUCOOL Test Area (MTA) at Fermilab. In order to achieve
a high accelerating gradient, the cavity beam irises are terminated by a pair of curved, thin beryllium windows.
Several of the fabrication methods developed for this cavity and the windows are novel and offer significant cost
savings compared to conventional construction methods. Cavity thermal and RF performance will be compared to
FEA modeling predictions. RF commissioning results will be presented.
Design of a 10 MHz Heavy Ion RFQ for a RIA Post Accelerator
Design of a 10 MHz heavy ion RFQ for the
RIA post accelerator is described. Main rf V. Andreev, S.O. Schriber (NSCL)
and mechanical parameters of the proposed
accelerator are given. This 10 MHz RFQ is capable of accelerating beams from an initial energy of 2 keV/u to 8 keV/
u covering a charge to mass ratio from 1/10 to 1/240.
Improved 1.3GHz Inductive Output Tube for Particle Accelerators
There is an increasing requirement for RF
power sources in the L-band frequency range A.E. Wheelhouse (e2v technologies)
for operation in particle accelerators. Previously
(at PAC 2005), the design, development and initial testing of a new L-band 16kW cw inductive output tube (IOT)
was described. This paper discusses the detailed performance characteristics of the latest EEV IOT116LS embodying
the most recent design improvements and presents data demonstrating its suitability for operation at 1.3GHz in the
next generation of light sources.
203
TUPCH147
TUPCH148
TUPCH149
TUPCH150