Abstracts Brochure - CERN

WEPLS — Poster Session 28-Jun-06 16:00 - 18:00
Electrical Systems and Power Supplies at the Spallation Neutron Source
There are over 600 magnet power supplies
and pulsed modulator systems at the Spallation
Neutron Source. An overview of these
systems is given, along with detailed systems
costs and a listing of installation and testing
effort for use as an estimating resource for
R.I. Cutler, D.E. Anderson, W.E. Barnett, P.S. Holik, K.R. Rust, T.L.
Toomey, M. Wezensky (ORNL) W. Eng, R.F. Lambiase, J.-L. Mi,
T.C.N. Nehring, J. Sandberg, W. Zhang (BNL) J.G. Gioia, W. Reass
(LANL)
future accelerator projects. Preliminary operational reliability statistics are given for each type of power supply. Also
are presented are a description and costing data for other Electrical Systems (AC power, racks, technical cabling)
installed in support of the remainder of accelerator systems (vacuum, beam diagnostics, rf, controls, etc).
Operation Status and Statistics of the KEK Electron/Positron Linac
The KEK electron/positron linac has been
operated since 1982, surpassing the total operation
time of more than 100,000 hours. It
delivers four different beams to four different
rings quite stably, even frequently switching
Y. Ogawa, A. Enomoto, K. Furukawa, T. Kamitani, M. Satoh, T.
Sugimura, T. Suwada, Y. Yano, K. Yokoyama, M. Yoshida (KEK) Y.
Imai, T. Kudou, S. Kusano, K. Suzuki, T. Toufuku (MELCO SC)
beam modes. The operation time per year has reached 7,000 hours since 1999 when the KEKB entered a normal
operation mode. Operation status and statistics will be reported with the emphasis on continuing efforts in various
kinds of machine improvements, which have ensured the stable operation.
Operational Status of Klystron-modulator System for PAL 2.5-GeV Electron Linac
The klystron-modulator(K&M) system of the
Pohang Accelerator Laboratory (PAL) gener- S.S. Park, J. Choi, Y.J. Han, J.Y. Huang, S.H. Kim, S.-C. Kim (PAL)
ates high power microwaves for the acceleration
of 2.5 GeV electron beams. There are 12 modules of K&M system to accelerate electron beams up to 2.5 GeV
nominal beam energy. One module of the K&M system consists of the 200 MW modulator and an 80 MW S-band
(2856 MHZ) klystron tube. The total accumulated high-voltage run-time of the oldest unit among the 12 K&M systems
has reached nearly 88,000 hours as of December 2005. The overall system availability is well over 95%. In this paper,
we review the overall system performance of the high-power K&M system and the operational status of the klystrons
and thyratron lifetimes, and the overall system’s availability will be analyzed for the period of 1994 to December 2005.
Update and Summary of the Dependability Assessment of the LHC Beam Dumping System
The LHC Beam Dumping System (LBDS)
must be able to remove the high intensity R. Filippini, J.A. Uythoven (CERN)
beams from the LHC accelerator on demand,
at any moment during the operation. As the consequences of a major failure can be very severe, stringent safety
requirements were imposed on the design. The final results of an in-depth dependability analysis on the LBDS
are summarised, for one year of operation and different operational scenarios. The trade-off between safety and
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