09.12.2012 Views

Abstracts Brochure - CERN

Abstracts Brochure - CERN

Abstracts Brochure - CERN

SHOW MORE
SHOW LESS

Create successful ePaper yourself

Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.

THPLS — Poster Session 29-Jun-06 16:00 - 18:00<br />

Radiation Dose Related to ANKA Operation Mode<br />

Radiation doses in the ANKA hall are<br />

measured by area monitoring and Albedo<br />

dosimeters. In August 2004 the machine optics<br />

was replaced by a new optics with re-<br />

I. Birkel, MH. Hagelstein, E. Huttel, A.-S. Müller, P. Wesolowski<br />

(FZK)<br />

duced emittance and higher brightness. Measurements of the beam lifetime and the related radiation doses show a<br />

strong correlation between the operation mode of the machine and the dose distribution in the hall.<br />

Wake Computations for the Beam Positioning Monitors of PETRA III<br />

At DESY it is planned to convert the PE-<br />

TRA ring into a synchrotron radiation facility,<br />

called PETRA III, in 2007. For proper<br />

design of PETRA III it is very important to<br />

A.K. Bandyopadhyay, A. Joestingmeier, A.S. Omar (Otto-Von-Guericke<br />

University) K. Balewski, R. Wanzenberg (DESY)<br />

estimate the wakes due to various discontinuities along the beam pipe. This article is on the wake computations<br />

for the beam positioning monitors (BPMs) in the PETRA III beam pipe. Two computer codes, namely MAFIA and<br />

Microwave Studio, were used for the electromagnetic field computations. Convergence tests and the agreement<br />

between the results of both softwares were taken as criteria in order to validate the results.<br />

Controlling the Vertical Emittance Coupling in CAMD<br />

The vertical beam size in the CAMD Light<br />

Source, as measured with an x-ray pinhole<br />

camera, indicates an emittance coupling ratio<br />

of 3%. This is consistent with the coupling<br />

V.P. Suller (CCLRC/DL/ASTeC) M.G. Fedurin, P. Jines, D.J.<br />

Launey, T.A. Miller, Y. Wang (LSU/CAMD)<br />

ratio as measured by the betatron tune split when the coupling resonance is fully engaged. It has been shown that the<br />

coupling is mainly produced in the 7T wiggler, which is known to produce non-linear fields. To correct this coupling,<br />

it is proposed to install up to four skew quadrupoles. The results of testing a prototype skew quadrupole in the lattice<br />

are presented. It is shown that the coupling will be substantially corrected by suitably distributing and powering the<br />

four skew quadrupoles.<br />

Diamond Light Source Vacuum System Commissioning<br />

Diamond Light Source is a new 3 GeV light<br />

source currently being commissioned in the<br />

UK. The main vacuum systems are a 561.6<br />

m circumference electron storage ring and a<br />

M.P. Cox, B. Boussier, S. Bryan, B.F. Macdonald, H.S. Shiers (Diamond)<br />

158.4 m circumference booster ring. The storage ring target operating pressure is 1·10 -9 mbar with 300 mA of stored<br />

beam after 100 A.h of beam conditioning. The booster ring target operating pressure is up to an order of a magnitude<br />

higher. Pumping is provided by discrete noble diode ion pumps, supplemented by titanium sublimation pumps and<br />

NEG cartridge pumps. Vacuum vessel construction is mainly from 316LN stainless steel. There is no in situ bakeout<br />

except for the 24 storage ring straights and the front ends. An ex situ bakeout process is used for the storage ring<br />

453<br />

THPLS022<br />

THPLS023<br />

THPLS024<br />

THPLS025

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!