High-intensity-beam behaviour in a storage ring
Oleh : Husin Sitepu
Sabtu, 6 Juli 2002 (14:42 WIB) dari IP 140.105.16.2

Dear all,

Greetings from ILL / ESRF Grenoble in France !

Tolong di sampaikan informasi terlampir kepada yang memerlukannya.

Selamat mempresentasikan karya ilmiahnya di SFN XIX .

With best regards,

Husin

__________________________________________________________________
Ph.D. Thesis Student (m/f) - Subject: ?High-intensity-beam behaviour in a
storage ring?

REF. CFR280
In Grenoble, France, the ESRF operates a state-of-the-art storage ring for
6 GeV electrons 24 hrs/day as a high brilliance synchrotron radiation
source for the production of X-rays. The financing of the ESRF is shared by
sixteen countries mainly European. Thirty ESRF beamlines are open to users.
The ESRF supports s cientists in the implementation of fundamental and
applied research on the structure of condensed matter in fields such as
Physics, Chemistry, Crystallography, Earth Science, Biology and Medicine,
Surface and Materials Science.
The Machine Division was responsible for the original design, assembly and
commissioning of the accelerator complex of the facility. Having entered
into a second phase, it now operates and develops the complex. Within this
division, we are now seeking to recruit a:
Ph.D. Thesis Student (m/f) - Subject: ?High-intensity-beam behaviour in a
storage ring?
General Framework:
The ESRF consists of a 200 MeV electron linac accelerator, a 6 GeV fast
cycling booster synchrotron and a 6 GeV low emittance storage ring
optimised to produce high brilliance X-rays from insertion devices. During
the commissioning period, the target performances were brilliantly achieved
and indeed have been considerably surpassed since then. We are now
gradually approaching the limits of the machine in terms of beam stability,
intensity and lifetime. In the light of this experience, the Machine
Division is now investigating the ultimate performance of storage ring
technology for X-ray production, in terms of average brilliance.
Description of the thesis work:
To achieve the highest possible brilliance the electron beam intensity is
one of the most critical parameters, among other parameters like emittance.
The beam current is limited by instabilities resulting from the interaction
of the beam-induced electromagnetic field with the environment (vacuum
chamber, accelerating cavities?). The goal of the present thesis is to
acquire a thorough understanding of high intensity beam behaviour. This
will involve both multi-bunch effects, related to the total intensity of
the circulating beam, and single-bunch effects, related to the bunch
intensity. Existing theories and codes will be revisited and adapted, and
the experience of the E.S.R.F. will be exploited.
Place of Work:ESRF in Grenoble
Supervisor:Laurent Farvacque
Tel: |PLS|33 (0)4 76 88 22 84 email: farvacque@esrf.fr
General Conditions:
The working language at the ESRF is English. You should hold a diploma
enabling registration for a PhD such as M.Sc., DEA, Diploma, Laurea or
equivalent in Physics.
Contract of 2 years renewable (subject to satisfactory progress) for one
year. Gross salary around 1960 ?/month. The applicant will be responsible
for arranging his/her academic registration and for paying the fees (if any).
If you are interested, please send us a fax (|PLS|33 (0)4 76 88 24 60) or an
e-mail (recruitm@esrf.fr) with your address, and we will provide you with
an application form. Or print out an application form on the World Wide Web
http://www.esrf.fr/. In addition to the application form, you should
provide us with a detailed CV and the names of two referees.
Deadline for returning the application forms: 18 June 2002
All applications received after the deadline may be considered for the
selected vacancy if not filled or for future similar positions.

4th June 2002 - Crystallography News Online - Copyright © International
Union of Crystallography

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