The Accelerator Laboratory provides foundation to scientific research at KEK

Particle accelerators are the basis of all research activities carried at High Energy Accelerator Research Organization (KEK). KEK would even lose the reason for its existence, if it did not have particle accelerators. The Accelerator Laboratory (ACCL) operates all accelerators at KEK, and develops the performance of the beam, which provides the basis of all corporative experiments on elementary particles, nuclear, material, and life sciences, etc., for researchers in Japan and the world. It is also endeavoring to research, design, and develop (RD&D) future accelerators and related technologies.

At Tsukuba Campus, ACCL operates KEKB B-Factory (electron-positron colliding rings with an injector linac), which gave experimental verification to Kobayashi-Maskawa theory to win 2008 Nobel Prize in Physics. It also operates two rings at Photon Factory (PF and PF-AR), which is a pioneer of synchrotron light sources in the world. It also performs RD&D for an Energy Recovery Linac (ERL) as a future light source. Developments for the International Linear Collider (ILC) has been done at experimental accelerators ATF and STF.

At Tokai Campus, ACCL has already started the operation of J-PARC for user’s experiments together with JAEA, and is paying a lot of efforts for improvement of beam performance with conquering various issues accompanied by a high intensity proton beam.
ACCL has carried out collaboration research with various accelerator laboratories and researchers in the world, including the United States (Fermilab, SLAC, Cornell Univ., JLab, etc.), Asia (IHEP-Beijing, Shanghai, Pohan, Taiwan, BINP, RRCAT etc.), Europe (CERN, DESY, INFN, etc.).

Accelerator Laboratory News

Indication of Electron Neutrino Appearance at the T2K Experiment (2011.6.15)
Tsukuba, Japan, June 15, 2011. The T2K experiment, whose primary purpose is to study neutrino interactions at a large distance from their source, has detected 6 electron neutrino candidate events based on the data collected before March 11, 2011. For the first time, it was possible to observe an indication that muon neutrinos are able to transform into electron neutrinos over a distance of 295 km through the quantum mechanical phenomena of neutrino flavor oscillations. ---more

Shin-ichi Kurokawa awarded Rolf Wideröe Prize (2011.6.3)
The European Physical Society Accelerator Group announced that Shin-ichi Kurokawa, professor emeritus at KEK and vice president of Cosylab, was awarded the Rolf Wideröe Prize, which is awarded to an individual for his or her outstanding work in the particle accelerator field. ---more

DG's Corner -Damage caused by the recent earthquake and recovery prospects- (2011.5.10)
First of all, I would like to express my deepest appreciation for the messages of concern, sympathy and encouragement that we received from all over the world since the major earthquake of March 11th. We are working to restore KEK as quickly as possible to its original condition so it can once again function as the exceptional research facility it was hitherto. Your messages do help a great deal in this difficult time.
Both the KEK-Tsukuba and KEK-Tokai (J-PARC) sites experienced tremors exceeding 6 on the Japanese seismic intensity scale, even though we are some 300 km away from the epicenter. This has caused a significant amount of damage to both facilities. ---more

The Sixteenth meeting of the KEKB Accelerator Review Committee was held (2011.2.14)
The Sixteenth meeting of the KEKB Accelerator Review Committee was held on February 7-9, 2011. This was the first meeting since SuperKEKB was formally approved and funded, so the Committee has been expanded to include experts from all around the world who came to KEK to help make the project a success. ---more

*Non Flash Version is here.

Japanese 9-cell SCRF cavity meets ILC specifications (2010.12.02)
The Japanese cavity achieved an important milestone. On 25 November, it fulfilled, for the first time, the production specifications for the International Linear Collider (ILC) in a vertical test conducted at KEK's Superconducting RF Test Facility (STF). The cavity, called MHI-013 is the 13^th in a series of nine-cell cavities fabricated by Mitsubishi Heavy Industries Co., Ltd. It demonstrated the accelerating gradient of 31.5 megavolts per meter (MV/m) with an unloaded quality factor (Q₀) over 1×10¹⁰, and 35 MV/m with Q₀ over 0.8×10¹⁰. As 31.5 MV/m is the targeted operating gradient of the ILC, 35 MV/m allows ten percent margin for this operating gradient. ---more

The 26^th OHO seminar on high-energy accelerator held at KEK (2010.10.05)
31 August -3 September, the OHO'10 seminar was held at KEK with 45 scientists and engineers form institutes, universities and industries. The purpose of OHO seminar is to develop and deepen the interest for the accelerator science of younger generations in both academia and industries. OHO seminar has been held once a year since 1984. ---more

NSRRC adopted KEKB-type superconducting cavity for Taiwan Photon Source project (2010.9.30)
National Synchrotron Radiation Research Center (NSRRC) in Taiwan chose the KEKB-type superconducting cavity to be installed into the synchrotron storage ring of the Taiwan Photon Source (TPS), the third generation synchrotron light source currently under construction right next to the site of existing accelerator, Taiwan Light Source (TLS). Mitsubishi Heavy Industries, Japan, received the order to fabricate three cavities scheduled to be delivered to NSRRC in 2012. ---more

by courtesy of NSRRC

The first Baseline Assessment Workshop for the ILC held at KEK (2010.9.30)
7-10 September, the first baseline assessment workshops (BAW-1) took place at KEK with 63 scientists and engineers from around the world. ---more

Cast your vote for top Particle Physics Photowalk photograph (2010.9.28)
On August 7, more than 200 photographers had the rare opportunity to go behind the scenes at five laboratories in Asia, Europe and North America, as part of the first Global Particle Physics Photowalk. Thousands of photographs were submitted to the laboratories for local and global competitions. The laboratories have made their choices, each nominating three photographs for global competition. Now it’s your turn -- starting today, you may vote for up to three of your favorite photographs as part of the “people’s choice” global photowalk competition.

KEK Openhouse 2010 (2010.9.6)
The Openhouse was on September 5, and some 3,300 people visited.
The visitors were interested in the research activities and the facilities of KEK.
http://openhouse.kek.jp/2010/index_e.html

*Non Flash Version is here.

SIMULTANEOUS TOP-UP OPERATION OF THREE DIFFERENT RINGS IN KEK INJECTORLINAC (2010.09.03)
In KEK Tsukuba campus, the four storage rings are operated for various user experiment. KEKB electron/positron ring (3 km circumference) is utilized for the high energy physics research. PF (187 m circumference) and PF-AR (377 m circumference) rings are the powerfull devices for the material and life science researches. KEK injector linac is a 600-m-long linear accelerator, and provides the electron and positron beams of different energy for the four independent rings. ---more

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