Abstracts Brochure - CERN

TUPLS — Poster Session 27-Jun-06 16:00 - 18:00
Tuning of a 4-rod CW-mode RFQ Accelerator
A four-rod RFQ accelerator has been built
which operates in CW mode with a power P. Fischer, A. Schempp (IAP)
consumption of 250 kW. The assembly of a
high power RFQ structure requires a precise mechanical alignment and field tuning of the electrode field. The field
distribution must be very flat to enable a proper operation with few losses. Adjusting of the field distribution is
critical in long structures. Simulations and the status of the tuned structure will be discussed.
The HITRAP RFQ Decelerator at GSI
The HITRAP linac at GSI will decelerate ions
from 5 MeV/u to 6 keV/u for experiments B. Hofmann, A. Schempp (IAP) O.K. Kester (GSI)
with the large GSI Penning trap. The ions,
provided by the GSI accelerator facility, will be decelerated at first in the existing experimental storage ring (ESR)
down to an energy of 5 MeV/u, and injected into a new IH decelerator and decelerated to 5oo keV/u. The following
4- Rod type RFQ will decelerate the ion beam from 5oo keV to 6 keV/u. The RFQ has been designed and will be built
at the Institute for Applied Physics in Frankfurt. The properties of the RFQ decelerator and the status of the project
will be discussed.
First Cryogenic Tests of the Superconducting CH-structure
The CH-structure is a new multi-cell drift
tube structure operated in the TE21-mode H. Podlech, H. Klein, H. Liebermann, U. Ratzinger, A.C. Sauer (IAP)
and is well suited for the acceleration of low
and medium beta ion and proton beams. Due to the mechanical stiffness room temperature as well as superconducting
CH-cavities can be realised. A 19-cell, beta=0.1 superconducting CH-prototype cavity has been developed and
built. First cryogenic tests have been performed at 4.5 K in Frankfurt successfully. An effective accelerating voltage of
3.6 MV has been achieved so far. This corresponds to an electric peak field of 23 MV/m. Actual measurements aim
on a localisation of possible field emission centers, afterwards further surface preparation will take place.
Simulations for the Frankfurt Funneling Experiment
Beam simulations for the Frankfurt Funneling
Experiment are done with RFQSim and J. Thibus, A. Schempp (IAP)
FUSIONS. RFQSim is responsible for the
beam transport through an RFQ accelerator. Behind the accelerator the particle dynamic program FUSIONS calculates
the macro bunches of both beam lines through an r.f. funneling deflector. A new space charge routine has
now been included. The status of the development of FUSIONS and the results of the simulations will be presented.
231
TUPLS040
TUPLS041
TUPLS042
TUPLS043