Abstracts Brochure - CERN

MOPLS038
MOPLS039
MOPLS040
MOPLS041
26-Jun-06 16:00 - 18:00 MOPLS — Poster Session
Beam Energy Calibration in Experiment on Precise Tau Lepton Mass Measurement at
VEPP-4M with KEDR Detector
A. Bogomyagkov, V.E. Blinov, S. Karnaev, V. Kiselev, E.V. Kremyanskaya,
E. Levichev, O.I. Meshkov, S.I. Mishnev, I. Morozov, N.Yu.
Muchnoi, S.A. Nikitin, I.B. Nikolaev, A.G. Shamov, D.N. Shatilov,
E.A. Simonov, A.N. Skrinsky, V.V. Smaluk, Yu.A. Tikhonov, G.M.
Tumaikin, V.N. Zhilich (BINP SB RAS)
118
Experiment on mass measurement of tau
lepton requires an absolute energy calibration.
The resonant depolarization technique
is used for most accurate (1 keV) but once at
a time energy calibration. The measured energy
is used for calibration of the germanium
detector for Compton backscattering energy
monitoring. The developed Compton backscattering facility allows continuous energy monitoring with accuracy of
50 keV for 10 minutes of data acquisition. The tau lepton threshold is in the vicinity of integer spin resonance, which
minimizes polarization lifetime in the presence of vertical orbit distortions. Therefore, spin matching of the VEPP-
4M is required. The achieved lifetime is sufficient for absolute energy calibration.
13 T Superconducting Solenoid for VEPP-2000 Collider
I. Koop, D.E. Berkaev, A.A. Borisov, A.V. Evstigneev, V.B. Khlestov,
S.V. Khrushev, N.A. Mezentsev, I. Nesterenko, P.Yu. Shatunov, Y.M.
Shatunov, V. Shkaruba, D.B. Shwartz (BINP SB RAS)
Final focusing of the new e + e − collider
VEPP-2000 in BINP is based on 13 T superconducting
solenoids. This paper presents
features of the design and manufacturing
of the four solenoids, which are already in-
stalled at the storage ring. Data of the magnetic measurements with comparison to previous calculations are given.
Magnet Structure of the VEPP-2000 Electron-positron Collider
P.Yu. Shatunov, D.E. Berkaev, A.A. Borisov, I. Koop, N.A. Mezentsev,
E. Perevedentsev, Y.M. Shatunov, D.B. Shwartz (BINP SB RAS)
A. Valishev (Fermilab)
Electron-positron collider VEPP-2000 with
beam energy up to 1 GeV is under commissioning
at Budker Institute. This paper
presents magnetic elements of the storage
ring including 13T focusing superconduct-
ing solenoids in interaction regions. Features of magnet elements design and magnetic measurements results are
given together with comparison to previously calculated data.
MAD-X/PTC Lattice Design for DAFNE at Frascati
In absence of a program that takes as an input
F. Schmidt (CERN) E. Forest (KEK) C. Milardi (INFN/LNF) the desired or known location of the magnets
in the tunnel, accelerator designers have been
using MAD8/X that looks at a ring as a sequence of magnets without a connection to the tunnel. In many simple
examples that is just fine, but once more complicated structures are treated one is bound to play tricks with MAD.
Here PTC comes to the rescue. It is shown how pieces of this machine that exist in MAD-X format are used in PTC to
create this double ring, as found in the tunnel, with a proper survey in the forward and backward direction. Special