Accl. Lab. Map
For Accel. Lab. Staff
#40 - 2009/9/15
Applying to do Research
Accelerator Laboratory News
First Beam Experiment by the Collaboration between 3 Nations: Japan, UK and USA (2011.06.23)
After 15 years of waiting the first tests of a novel Low Output Impedance (LOI) acceleration system with beam in the ISIS proton synchrotron at the Rutherford Appleton Laboratory (RAL), UK, were completed on April 17, 2011. The system was quite stable under high-intensity beam current, and the output impedance was measured to be as low as 35ohms, which is almost the design value and about 40 times lower than that in the existing acceleration systems. There is still much more work to do to make this system – or something like it – an operational part of a real synchrotron, but the initial results are very promising. This approach may point the way towards upgrades of existing accelerators and future high-intensity ones. ---more
(
linked 2011.06.23)
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
Accelerated Higher Intensity Heavy Ion Beam with New Linac System (2011.04.14)
Research Laboratory for Nuclear Reactors in Tokyo Institute of Technology had developed a multi-beam type RFQ (Radio Frequency Quadrupole) linac system accelerating several heavy ion beams in parallel in one cavity. This system has made it possible for generating high intensity heavy ion beams, never before possible such as 100 mA and more, without growing the machine scale. ---more
( linked 2011.04.14)
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 (2010.12.09)
Designing and fabricating an optimal accelerating cavity is not so simple. There are two important parameters scientists are looking for: the gradient of 35 megavolts per meter (MV/m) and the quality factor (Q0) of greater than 8×109. A Japanese cavity now fulfilled those requirements for the first time at a test which took place at the Superconducting radiofrequency Test Facility (STF) at KEK, adding momentum towards future mass production. ---more
( linked 2010.12.09 / ILC Newsline linked 2010.12.09 )
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 13th 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
Start operation of the Small Electron Linear Accelerator for calibration of the Fluorescence Detector of the Telescope Array experiment (2010.10.14)
The Telescope Array ( TA ) experiment is a ultra-high energy cosmic rays ( UHECRs ) observation which is established in the desert area about 200 km far from Salt Lake City in Utah state, north U.S. We began the observation in April 2008. The UHECRs are the highest primary cosmic rays which have energy more than 1018 eV. However, we do not understand any fundamental features, for example the chemical composition, their generation and acceleration mechanism, and the theoretical flux limit ( GZK-cutoff ). ---more
( linked 2010.10.21)
IPAC10 Special Lectures to Commemorate the 120th Anniversary of the Birth of Yoshio Nishina 〜From TRISTAN to B-Factory〜 (2010.10.07)
TRISTAN was the first Japanese electron-positron collider, and built in 1981-1986. The collision energy attained was 64GeV, then the highest in the world. National Laboratory for High Energy Physics(KEK) was founded in 1971 as the first national laboratory for inter-university research, and a 12GeV proton synchrotron was built in 1971-1974 as its major research facility(KEK-PS). It must be noted that the KEK-PS energy was initially proposed to be 40Gev and compelled to lower to 12GeV to cope with the government's budget cut to a quarter of the initial demand( about 30BYen). Intriguing is that the 40GeV PS plan was realized as J-PARC after almost 40 years, though the machine design was considerably different each other. ---more
The 26th 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
Summer Challenge programme for young intelligence (2010.09.03)
About 90 students from all parts of Japan gathered at the Summer Challenge programme held at KEK, Tsukuba from 21 to 29 August 2010. Starting in 2007, this programme intended for junior students who are interested in high-energy physics was the fourth in the series this year. ---more
The first global Particle Physics Photo Walk held at 5 world's particle physics labs (2010.09.03)
KEK took 40 photographers behind the scenes. On August 7, photographers, both amateurs and professionals visited, explored and took photos of KEK's facilities, accelerators, detectors, people and any objects interested them. They took part in the first global Particle Physics Photowalk took place on this same day around the world at five physics laboratories in five countries: CERN (Switzerland), DESY (Germany), Fermilab (USA), TRIUMF (Canada) and KEK. ---more
The fifth POSIPOL workshop held at KEK (2010.06.10)
The POSIPOL 2010 workshop was held from 31 May to 2 June at KEK. It was the fifth in the POSIPOL series of workshops dealing with the physics aspects, the design issues, and the open questions concerning a polarized positron source in the framework of the next-generation electron-positron colliders such as the ILC or the Compact Linear Collider Study CLIC. ---more
The 15th KEKB Accelerator Review Committee was held (2010.02.18)
The Fifteenth KEKB Accelerator Review Committee meeting was held on February 15-17, 2010. Appendix A shows the present membership of the Committee. The Committee was as always impressed by the high standard of the talks, both the technical content and the presentations themselves. 
1st Joint Asian Accelerator Workshop held in China(2010.01.18)
22-23 December, the Joint Asian Accelerator Workshop (JAAWS) was held at the Institute of High Energy physics (IHEP), in Beijing, China, as the first step for establishing a new initiative to promote stronger and more effective collaboration on R&D works in accelerator science and its application. The directors and leading scientists from core laboratories in five Asian countries - China, India, Japan, Korea and Russia - have gathered at a kickoff workshop to seek for possible future collaborations. ---more
KEKB/Belle integrated luminosity reached 1000 fb-1(2009.12.18)
AT KEKB B-Factory, the total integrated luminosity accumulated by the Belle detector reached 1000 fb-1 on November 29th 2009, which was the initial goal of the KEKB project.
The Belle detector was installed in the KEKB accelerator in May 1999. This new record has been accomplished ten and a half years after the installation. The accumulation of 1000 fb-1 has been achieved for the first time in the world, while KEKB has been being operated with the world highest peak luminosity. The figure shows the history of the integrated luminosity at KEKB/Belle. It may seem that the accumulation has been achieved relatively smoothly. In reality, however, this has been done with various efforts such as those for increasing beam currents by overcoming a number of vacuum troubles and those for suppressing the effects of the electron clouds by installing solenoid coils all around the positron ring. To accumulate the integrated luminosity at a higher rate, it is important to lower the frequency of machine troubles and to keep the beams stably without beam aborts, in addition to raising the peak luminosity. In this sense, the achievement of this record is the fruits of the efforts of all members who have been concerned with KEKB including the staff of the facility division or the injector.
(▲KEK web
)
Openhouse 2009 (2009.9.9)
The Openhouse was on September 6, and some 3,900 people visited.
The visitors were interested in the research activities and the facilities of KEK.
http://openhouse.kek.jp/2009/index-e.html
[Click image for larger view 752KB]
Using Crab Cavities, KEKB Breaks Luminosity World Record (Current operation summary) (2009.6.18)
Peak Luminosity2.1083 x 1034 cm-2 s-1 (2009.6.17 17:12)
Daily Integrated Luminosity 1.4794 /fb (2009.6.14)
Proton beam reaches neutrino target at J-PARC (2009.4.23)
At 19:09 on April 23, J-PARC has reached a new milestone with successful extraction of proton beam to a neutrino target.
The proton beam accelerated to 30 GeV in the J-PARC Main Ring was extracted and transported through the beam line which has 14 superconducting dipoles and then hit on the neutrino target.
This achievement denotes the start of challenge to send high-power neutrino beams to the Super-Kamiokande detector which locates 295 km west from the J-PARC cite for long baseline neutrino oscillation experiment.(J-PARC)
Protons are successfully accelerated and transported to J-PARC Hadron Experimental Hall
A new milestone was set by the 50 GeV Synchrotron, which is the 3rd and the last stage of the accelerators of the Japan Proton Accelerator Research Complex (J-PARC), on January 27, 2009. Protons were accelerated up to 30 billion electron-volts (30 GeV), then successfully extracted to Hadron Experimental Hall in Nuclear and Particle Physics Facility and transported to the beam dump. (2009.1.28)
ATF2 for R&D of nano-meter electron beam has been started(2009.1.9)
A new beamline for R&D toward nano-meter electron beam has started operation at KEK's Accelerator Test Facility - ATF.
|
|
|
 |
|
MR: Successful injection of 3GeV proton beam, RF captured and extraction
At 22:27 of May 22nd 2008, the 3 GeV proton beams from the RCS (3GeV proton synchrotron) were successfully injected into the Main Ring (50GeV proton synchrotron). The beam was captured by RF and extracted to the beam dump after 1000 turns. The day after, the beam storage time was extended up to 1 second. It is the major milestone for the J-PARC. The next step is to accelerate beams to 30GeV (Phase I) and to extract beams to the experimental holes, which will start in the end of this year. (by nh 2008.5.27)
Prof. Ohmi is recognized as one of the Outstanding Referees of Physical Review (08.03.27)
| Using Crab Cavities, KEKB Breaks Luminosity World Record (Current operation summary) (2009.6.18) Peak Luminosity2.1083 x 1034 cm-2 s-1 (2009.6.17 17:12) Daily Integrated Luminosity 1.4794 /fb (2009.6.14) | |
|
 |
Applying to do ResearchThe Graduate Univ. forAdvanced Studies
Meeting & SeminarLink
Electronic Gofer Accl. Operations
Future Accl. Projects
Accelerator R&D
Theoretical Research
Archives
| Copyright(c) 2008, HIGH ENERGY ACCELERATOR RESEARCH ORGANIZATION, KEK 1-1 Oho, Tsukuba, Ibaraki 305-0801 Japan |
｜web-acc  ml.post.kek.jp｜Copyright
▲Top Page |