| Paper |
Title |
Page |
| TUPC054 |
Pulse-by-pulse Photon Beam Monitor with Microstripline Structure in NSRRC
|
1176 |
| |
- C. K. Kuan, C. L. Chen, J.-R. Chen, G.-Y. Hsiung, I. C. Sheng, Z.-D. Tsai, D.-J. Wang
NSRRC, Hsinchu
- H. Aoyagi, H. Kitamura, S. Takahashi
JASRI/SPring-8, Hyogo-ken
|
|
| |
In order to diagnostic pulse-by-pulse beam movement of photon beam, NSRRC(Taiwan) and SPring-8 (Japan) have worked together to develop a front end beam monitor with microstripline structure, which is designed to have specific impedance of 50 ohm. The detector head is composed of a metal line (copper), ceramic plates (aluminum nitride) and a cooling base (copper tungsten). The metal line functions as a photocathode. The metal line is directly connected to SMA feed-through connectors to have fast response time. The detector head has been fabricated in SPring-8, and mounted on the monitor chamber and installed in NSRRC Superconducting Wiggler (SW) front end. The beam monitor can be used to examine not only pulse-by-pulse photon beam, but also the storage ring intensity and the pulse timing. Unique feature of the monitor is to produce unipolar short pulses. The design, fabrication and the measurement will be presented in this paper.
|
|
| THPC146 |
Beam Halo Monitor Using Diamond Detectors for XFEL/SPring-8
|
3330 |
| |
- H. Aoyagi, Y. Asano, T. Bizen, K. Fukami, N. Nariyama
JASRI/SPring-8, Hyogo-ken
- T. Itoga, H. Kitamura, T. Tanaka
RIKEN/SPring-8, Hyogo
|
|
| |
The construction of the XFEL facility at SPring-8 has been started. We have been developing a halo monitor as an interlock device for protection of undulator permanent magnets against radiation damage. When permanent magnets are irradiated with a halo part of 8GeV electron beam, magnetic fields are degraded permanently and laser oscillation is weakened. Therefore, the interlock device is required during machine operation. Diamond detector, which operates in photoconductive mode, is good candidate for electron beam sensor. The beam test of the diamond detector head has been carried out at the beam dump of the SPring-8 booster synchrotron. Minimum number of injected electron was about 1·105 /pulse, and we observed the pulse height of 0.1V having the pulse length of 0.6nsec FWHM without a preamplifier. The linearity of output signal on injected beam was also demonstrated. The beam halo monitor equipped with the diamond detectors is under manufacturing. The design and feasibility tests will be presented in this conference.
|
|