Compensation of the Crossing Angle with Crab Cavities at KEKB (2007)
Abe, T., Akai, K., Akemoto, M., Akiyama, A., Arinaga, M., Ebihara, K., ...
Crab cavities have been installed in the KEKB B--Factory rings to compensate the crossing angle at the collision point and thus increase luminosity. The beam operation with crab crossing has been...
Observation of Vertical Betatron Sideband due to Electron Clouds in the KEKB LER (2004)
Flanagan, J. W., Ohmi, K., Fukuma, H., Hiramatsu, S., Tobiyama, M., Perevedentsev, E.
The effects of electron clouds on positively-charged beams have been an active area of research in recent years at particle accelerators around the world. Transverse beam-size blow-up due to electron...
Negative Momentum Compaction at KEKB (2004)
Ikeda, H., Flanagan, J. W., Fukuma, H., Hiramatsu, S., Ieiri, T., Koiso, H., ...
KEKB is a high luminosity e+e- collider for studying B mesons and has achieved the design luminosity of 1034cm-2s-1 in 2003. In order to get higher luminosity, we tested negative momentum compaction...
KEKB Beam Instrumentation Systems (2002)
M. Arinaga, J. Flanagan, S. Hiramatsu, T. Ieiri, H. Ikeda, H. Ishii, ...
For the stable high-luminosity operation and luminosity-increase, the electron and positron storage rings of the KEK B-Factory (KEKB) is equipped with various beam instrumentations, which have being...
Overviewofbeaminstrumentationforhigh-Intensity (2002)
J. W Flanagan, M. Arinaga, S. Hiramatsu, T. Ieiri, H. Ikeda, H. Ishii, ...
This paper will present an overview of beam instrumentation with a view towards relevance for future accelerator projects on the basis of experience at KEKB. The KEKB B-Factory shares with other...
Beam Diagnostics Using Bunch-By-Bunch Feedback (2001)
M. Tobiyama, E. Kikutani, J. W. Flanagan, S. Hiramatsu
Transverse bunch-by-bunch feedback systems for damping coupled-bunch instabilities in the KEKB rings have been working well since the early stages of the commissioning of the rings. Beam diagnostic...
Bunch By Bunch Feedback Systems For The Kekb Rings (2001)
M. Tobiyama, E. Kikutani, J. W. Flanagan, S. Hiramatsu
Transverse bunch-by-bunch feedback systems for damping coupled-bunch instabilities in the KEKB rings have been working since the early stage of the commissioning of the rings. Stabilization of the...
J. W. Flanagan, N. Akasaka, H. Fukuma, S. Hiramatsu, T. Mitsuhashi
In order to investigate the single-beam vertical beam-size blow-up observed[1] in the KEKB 3.5 GeV positron ring (LER), we performed beam-size observations using a highspeed gated camera capable of...
First Beam Collision In The Kekb (1999)
Y. Funakoshi, K. Akai, N. Akasaka, A. Enomoto, J. Flanagan, H. Fukuma, ...
The first beam collision study was done in the KEKB double ring collider. Beam collision conditions were found by searching beam-beam deflection curves in a trial-and-error method. From these curves,...
Recent Studies On Beam-Photoelectron Instability (1999)
S. H. Wang, J. W. Xu, K. R. Ye, C. Zhang, F. Zhou, Beijing China, ...
An experiment investigating the photoelectron instability has been performed in BEPC at IHEP, China. The betatron oscillation of each bunch was observed and recorded by a single pass beam position...
Lattice Diagnostics Using Single Kick Closed Orbit (1999)
Y. Ohnishi, K. Akai, N. Akasaka, A. Enomoto, J. Flanagan, H. Fukuma, ...
We have measured beta functions using single kick closed orbit at KEKB. The measured beta functions were compared with the model lattice and gradient errors were extracted from the result in a beta...
$\gamma\gamma$ collider as an option of JLC (1998)
Watanabe, I, Hiramatsu, S, Nakajima, K, Tauchi, T, Yokoya, K, Endo, I, ...
Beam position monitor system for KEKB (1998)
Tejima, M, Arinaga, M, Ieiri, T, Ishii, H, Mori, K, Hiramatsu, S
The proposed experimental study on beam-photoelectron interactions in BEPC (1996)
Guo, Z Y, Liu, D K, Ma, L, Wang, J Q, Wang, S H, Zhang, C, ...
Design of beam position monitor system for KEKB (1996)
Akasaka, N, Arinaga, M, Hiramatsu, S, Ieiri, T, Ishii, H, Mori, K, ...
1.5 MeV ion-channel guided X-band free-electron laser amplifier (1995)
Takayama, K, Kishiro, J, Ebihara, K, Ozaki, T, Hiramatsu, S, Katoh, H
RF Induced Depolarizing Resonanaces, Spin Flip, and Partial Siberian Snakes (1992)
Anferov, V.A., Baiod, R., Chao, A.W., Chu, C.M., Courant, E.D., Derbenev, Ya.S., ...
This research was sponsored by the National Science Foundation Grant NSF PHY-9314783
Workshop on the Experiments by Polarized Proton and ElectronBeams (1990)
Hiramatsu, S, Horikawa, N, Nakanishi, T, Tamae, T, Hasegawa, T
NARROW STRUCTURES OBSERVED IN THE p-p ANALYZING POWER AND NARROW RESONANCES (1990)
Shimizu, H., Glass, G., Hiebert, J., Hiramatsu, S., Holt, J., Imai, K., ...
Small but rather narrow structures have been observed in the momentum dependence of the analyzing power in proton-proton elastic scattering around 1 GeV/c. A possible explanation for the structures...
NARROW STRUCTURES OBSERVED IN THE p-p ANALYZING POWER AND NARROW RESONANCES (1990)
Shimizu, H., Glass, G., Hiebert, J., Hiramatsu, S., Holt, J., Imai, K., ...
Small but rather narrow structures have been observed in the momentum dependence of the analyzing power in proton-proton elastic scattering around 1 GeV/c. A possible explanation for the structures...
NARROW STRUCTURES OBSERVED IN THE p-p ANALYZING POWER AND NARROW RESONANCES (1990)
Shimizu, H., Glass, G., Hiebert, J., Hiramatsu, S., Holt, J., Imai, K., ...
Small but rather narrow structures have been observed in the momentum dependence of the analyzing power in proton-proton elastic scattering around 1 GeV/c. A possible explanation for the structures...
THE FIRST ACCELERATION TEST OF POLARIZED PROTONS IN KEK PS BOOSTER (1985)
Hiramatsu, S., Sato, H., Toyama, T., Arakawa, D., Ando, A., Mori, Y., ...
Depolarization of the polarized proton beam accelerated in the 500 MeV booster was investigated as the first step of polarized proton acceleration in the KEK proton synchrotron. Beam polarization was...
THE FIRST ACCELERATION TEST OF POLARIZED PROTONS IN KEK PS BOOSTER (1985)
Hiramatsu, S., Sato, H., Toyama, T., Arakawa, D., Ando, A., Mori, Y., ...
Depolarization of the polarized proton beam accelerated in the 500 MeV booster was investigated as the first step of polarized proton acceleration in the KEK proton synchrotron. Beam polarization was...
THE FIRST ACCELERATION TEST OF POLARIZED PROTONS IN KEK PS BOOSTER (1985)
Hiramatsu, S., Sato, H., Toyama, T., Arakawa, D., Ando, A., Mori, Y., ...
Depolarization of the polarized proton beam accelerated in the 500 MeV booster was investigated as the first step of polarized proton acceleration in the KEK proton synchrotron. Beam polarization was...