Abstracts Brochure - CERN

TUPCH070
TUPCH071
TUPCH072
27-Jun-06 16:00 - 18:00 TUPCH — Poster Session
by itself. The PBPM of this type is appropriate for a front-end with spatial limitation and is expected to be more
advantageous, on the aspects of initial alignment and later maintenance, compared to measuring vertical angles using
two PBPMs. This presentation explains the design details and the measuring principles of the PBPM and discusses
the measured results from the beamline.
Development of Beam Profile Monitor for Cyclotron
K.-H. Park, S.-M. Hong, Y.G. Jung, D.E. Kim, H.-G. Lee, W.W.
Lee (PAL) D.H. An, J.-S. Chai, Y.S. Kim (KIRAMS) B.-K. Kang
(POSTECH)
180
A beam profile monitor was designed and
fabricated to measure the beam shape of
the cyclotron MC50 beam line at KIRAMS.
The sensor module was made of 13 tungsten
wires and they were assembled into an array
type. The sensor wires whose diameter is 1 mm were placed in parallel with the incident beam, while they were
placed in the perpendicular direction to the incident beam in the conventional method. Thus this monitor has a linear
actuator to scan whole beam profile, which moves the sensor module from the dormant to measurement position or
vice versa. The current output of each sensor was amplified using a trans-resistance amplifier which can measure
input current in the range of 1 pA. The amplifier had a resolution of ∼ 20 fA, the temperature drift of ∼0.5 pA/ o C,
and the signal-to-noise ratio greater than 80 dB. Various test results of the amplifier and sensor module assembly are
given in this paper. The measured current profiles of cyclotron beam line at KIRAMS are also given.
Testing the Silicon Photomultiplier for Ionization Profile Monitor
S.V. Barabin, D.A. Liakin, A.Y. Orlov (ITEP) P. Forck, T. Giacomini
(GSI)
A new kind of photonic device is proposed
to be used in the fast operating mode of the
ionization profile monitor. A silicon photomultiplier
device combines the advantages
of photomultipliers and solid-state photo detectors. It provides high sensitivity, wide optical spectrum response,
high bandwidth and absence of 1/f noise component. Those parameters are critical in the IPM with fast readout
feature, which is developing in GSI in collaboration with ITEP, COOSY, MSU and CRYRING laboratories. Very first
investigations were made to obtain detailed parameters of silicon photomultiplier. A testing layout and resulting
performance data are presented in this publication.
New Generation Streak Camera Design and Investigation
The only method for electron bunch duration
A.M. Tron (LPI) T.V. Gorlov, I.G. Merinov (MEPhI)
monitoring with a resolution in the order of
10 fs and less is the method of photochronography
of the bunch incoherent radiation in the frequency range, for example, of visible light and at realizing streak
camera with new principles of its operation*. In the paper the streak camera design for measuring both the electron
bunches and x-ray pulses duration with the mentioned temporal resolution is presented. The results of the camera
investigation, with photoelectron dynamics simulation taking into account space-charge effect and impact of the surface
roughness of a spherical photocathode of the 20-50 micrometers radius (forming a modulating gap of spherical
configuration) on the camera resolution, are presented and discussed.