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About the restoration of East Japan Great Earthquake (J-PARC)
http://j-parc.jp/Following message is provided here on behalf of J-PARC.
October 10, 2012
J-PARC Center
■ Situation immediately after East Japan Great Earthquake
▪ Note #2 March 18, 2011
▪ Message from J-PARC Director Shoji Nagamiya (March 14, 10:30 am, 2011)
▪ Note #1 March 12-13, 2011
■ Post-disaster situation and progress of restoration
■ Message from the Director, J-PARC Center
■ Announcement for the entry of users at J-PARC
■ Updated Status of J-PARC Facilities (4 months after the Earthquake)
▪ J-PARC Project Newsletter No. 47, Jan. 2012 dispatch (Jan. 26, 2012)
▪ J-PARC Project Newsletter No. 46, Oct. 2011 dispatch (Ocu. 21, 2011)
▪ J-PARC Project Newsletter No. 45, July 2011 dispatch (Jul. 25, 2011)
▪ J-PARC Project Newsletter Special Issue, June 2011 dispatch (Jun. 17, 2011)
▪ J-PARC Project Newsletter Special Issue, May 2011 dispatch (May. 27, 2011)
▪ J-PARC Project Newsletter No.44, April 2011 dispatch (Apr. 26, 2011)
▪ J-PARC Project Newsletter Special Issue, Mar 15, 2011 dispatch (Mar. 15, 2011)
■ Notice of Starting Test Run of Beams in J-PARC
▥ Situation immediately after East Japan Great Earthquake
Note #2 March 18, 2011
- On the 17th of March we inspected inside. We were very afraid for this late inspection, since the earthquake was on the 11th of March. However, inside was very calm and no significant damages were observed. Even no cracks were seen. Inside Linac and also inside the neutrino detector area, there was about 1cm in depth of water. There are no waters for other places. All the accelerators look very healthy by glancing from outside, though detailed inspection is definitely needed. For example, we were not sure if ceramic chambers have any cracks, etc. etc. Furthermore, all experimental areas, MLF, hadron and neutrino were, to a first order approximation, fine, again, from a brief glance alone. Toward the extension direction of the hadron hall the outer wall was slipped and this is a dangerous situation. We will perform detailed inspection after lights are on, since no electricity is available at this moment for the J-PARC.
- Outside areas were severely damaged. For example, one major and one minor electric power supplies were leaning. In addition, in the MLF area an experimental hall was extended to outside the main bulging. There, the outside experimental floor was about 30 cm dropped vertically as compared to the main building. Therefore, experimental devices were leaning and damaged. Neutron target was shaken significantly with significant cracks.
- Roads and ground surfaces were wound or dropped by 30 cm to 1 meter in many places.
- We have two major power supplies. One was in a reasonable shape and can be used within a few days. However, the other power supply has a significant problem. We use the first one and also, by borrowing a healthy power from the campus, we will start, within a week, to have lights inside the tunnel. Also, we will start to function various motors to remove water in the linac and neutrino areas and also to dry all the accelerator areas.
- Water is not yet available in Tokai.
- The entire impression is that we are confident to recover the machine within reasonable time, since almost all elements looked the same as they were before the earthquake, though we will have many many things to do. We have to start testing one equipment to the other carefully, even if it takes time.
Message from J-PARC Director Shoji Nagamiya (March 14, 10:30 am, 2011)
Today, we had a meeting on J-PARC. Please keep in mind the followings:
- Please do not come to enter the J-PARC area for a while. For the coming three days the place is totally out of service.
- We shall inform you the status after things may clear up. Until that time, the J-PARC is closed.
- Fortunately, no injuries are observed for J-PARC related persons and no radiation problems have happened. Also, all the buildings seen from outside are in good shape without any effects of Tsunami, though surrounding roads are severely damaged.
- Details will be informed later.
Note #１ March 12-13, 2011 (Three messages were combined)
- You might be worrying a big earthquake effect in Japan. In so far, we have not heard anyone in and around the J-PARC were injured or dead. This is the first thing that I worried, but I was very much relieved by hearing it. We were lucky, since in the next power generator area outside the campus, four people were unfortunately dead.
- When the earthquake came, I was in Tsukuba. On the next day on March 12, I drove to Tokai to see J-PARC. At least, there were no Tsunami effects on J-PARC. Buildings were very strong so that from outside there were no significant damages for all buildings, whereas many roads around the J-PARC were severely damaged. In Linac and MLF, big gaps of 20-50 cm were detected, primarily since the road is dropped, whereas J-PARC buildings remain as they were.
- We designed to tolerate up to 10 meter of Tsunami. This time, very fortunately lower than this limit. Neighbors (north of J-PARC) had a significant Tsunami effect, though.
- The beam was on when this big Earthquake hit. We immediately stopped the beam. There were not hints that magnets fell down.
- All roads from KEK to Tokai were damaged, in particular, freeway, trains, etc. Accesses are therefore very limited. Today I used normal road from my house to J-PARC. It took over 7 hours for the round trip (usually about two or two and a half hours using freeway)
- Since the accelerator is very delicate one, we all would like to start to study it from Monday, next week. I do not know how long it deos take to recover to the original shape.
- For non-Japanese people working at J-PARC, all were safely transferred to either Tsukuba, Tokyo and the Airport since although everyone is fine, the foods, electricity, water, etc. are limited.
PS Note:
The J-PARC is located on the seaside where a big Tsunami came. At the north side of J-PARC, a big parking lot exists and, there, over 200 cars were parking. They are brand new cars fabricated by Nissan and waiting for export. All the car were completely smashed immediately after the big Tsunami came. I was therefore very afraid for J-PARC. I went there on the next day and found that the damage was minimal.
▥ Post-disaster situation and progress of restoration
As of November 2, 2011 PDF:453KB
As of September 9, 2011 PDF:713KB
As of August 8, 2011 PDF:407KB
As of May 31, 2011 PDF:636KB
As of April 20, 2011 PDF:648KB
As of April 4, 2011 PDF:208KB
As of March 28, 2011 PDF:2.7MB
▥ Message from the Director, J-PARC Center
Shoji Nagamiya, J-PARC Center: May 16, 2011
2 min., 7 sec.
※ To see the video, Windows Media Player is necessary.
▥ On J-PARC Recovery Schedule
As of May 20, 2011 PDF:225KB
▥ Announcement for the entry of users at J-PARC
April 1, 2011
- As of April 4th, the entry of users who have worked for equipment construction will be permitted.
- Radiation level around the J-PARC area is below 0.5 microSv per hour.
- All lodgings except Akogiaura Club are available.
- Details will be handled by each Division.
▥ Operation Plan for J-PARC
April 6, 2011
Because of the East Japan Great Earthquake, J-PARC was heavily damaged in the facilities and devices therein.
We are now trying to grasp the damage situation of each device, unfortunately however, it seems that a considerably long time period would be necessary to resume operations.
Therefore, we need to review our operation plan for FY2011. At the present moment, it has not been decided yet for not being able to predict how long it will take to restore the facilities.
Please accept our sincere apologies for the inconvenience you have been put to. All the parties concerned are now undertaking the restoration of the facilities with the utmost energy. Your kind understanding and cooperation would be much appreciated.
As soon as the operation plan for FY2011 will be determined, we will inform you of it through our webpage.
Thank you,
▥ Updated Status of J-PARC Facilities (4 months after the Earthquake)
July 7, 2011 PDF:1.69MB
▥ J-PARC area dose-rate map
Measured on October 10, 2012 PDF:451KB
Measured on March 14, 2012 PDF:419KB
Measured on November 30, 2011 PDF:419KB
Measured on July 6, 2011 PDF:382KB
Measured on June 1, 2011 PDF:384KB
Measured on May 13, 2011 PDF:385KB
Measured on April 27, 2011 PDF:381KB
Measured on April 20, 2011 PDF:380KB
Measured on April 13, 2011 PDF:490KB
▥ About press release
J-PARC provides alternative research opportunities for MLF users: June 17, 2011
Indication of Electron Neutrino Appearance at the T2K Experiment: June 15, 2011
▥ J-PARC Project Newsletter
Issuance on Jan. 21, 2012
▪ J-PARC Project Newsletter No. 47, Jan. 2012 dispatch (Jan. 26, 2012)
Issuance on Oct. 21, 2011
▪ J-PARC Project Newsletter No. 46, Oct. 2011 dispatch (Oct. 21, 2011)
Issuance on Jul. 25, 2011
▪ J-PARC Project Newsletter No. 45, July 2011 dispatch (Jul. 25, 2011)
Issuance on Jun. 17, 2011
▪ J-PARC Project Newsletter Special Issue, June 2011 dispatch (Jun. 17, 2011)
Issuance on May. 27, 2011
▪ J-PARC Project Newsletter Special Issue, May 2011 dispatch (May. 27, 2011)
Issuance on Mar. 15, 2011
▪ J-PARC Project Newsletter No.44, April 2011 dispatch (Apr. 26, 2011)
Issuance on Mar. 15, 2011
▪ J-PARC Project Newsletter Special Issue, Mar 15, 2011 dispatch (Mar. 15, 2011)
▥ About Topics
February 23, 2012
Annual Report 2010 Issued"
>>> more
January 24, 2012
International Symposium on "Future of Accelerator-Driven System"
>>> more
January 10, 2012
New Year' s Message of 2012 from the Project Director
>>> more
November 28, 2011
About operation plan in FY 2011
>>> more
November 17, 2011
Announcement of the J-PARC MLF User Program for 2012A Call for Proposals
>>> more
August 12, 2011
Notice of The 13th Program Advisory Committee (PAC) for Nuclear and Particle Physics Experiments at the J-PARC 50GeV Proton Synchrotron
>>> more
July 25, 2011
The Twelfth Program Advisory Committee meeting for Nuclear and Particle Physics Experiments at J-PARC was held
>>> more
July 15, 2011
Announcement of the J-PARC/MLF user program for the 2011B term
>>> more
▥ Notice of Starting Test Run of Beams in J-PARC
December 9, 2011
We would like to inform you that we will start a test run of the beam for accelerators from December 9, 2011, while we are in the course of restoration.
If there would be no problem found in devices or equipment after the test, we will plan to offer the use of our facility for the period about two months in FY 2012, as described in "J-PARC Recovery Schedule (Designed on May 20, 2011)".
Schedule of the test run for beam of accelerators:
Dec. 9 (Fri.): Starting test run of the beam for LINAC
Dec. 18 (Sun.): Starting test run of the beam for RCS (3 GeV synchrotron)
Dec. 22 (Thu.): Starting test run of the beam for MR (50 GeV synchrotron)
Please note that the above schedule may be changed according to the progress of the test.
J-PARC Center
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