Current Status of J-PARC Facilities

October, 2011

LINAC-1
・ Repair work of inside the building has been completed, while that of exterior (e.g., plumbing)still continues.
・ ACS (Annular Coupled Structure)-type acceleration cavity has been repaired and it isfunctioning.

Restoration Work in front of the Entrance

Repair Work of Partition Walls
Replacement of Catch Pit, and Supply and Drain Pipes

Installation of ACS in Tunnel

LINAC-2
・ We have been conditioning the ion source since October 11. This is the first proton beamat J-PARC after the March earthquake.
・ Alignment of ~200 L3BT electromagnets is continued, and 60% has been completed .
・ Continuous running test of RFQ has been conducted since October 17.
・ Leak check of newly installed monitors has been completed.
・ Cooling water is supplied for 24 hours as usual.

ビーム電流

Alignment of Ｌ３ＢＴ electromagnets

97%

Ion source (above);
The beam current
reached to 24 mA
within three hours(left).

～80%←RQF test: The
high voltage isincreasing smoothly.

3 GeV Synchrotron (RCS)-1
Restoration work of RCS is going smoothly.
・Re-leveled transformers and condensers in the yard have been inspected and maintained.
・Inspection and maintenance of the vacuum system, high frequency cavities and monitor
system have also been conducted.
・Restoration work of the building and theBellows foryard has been almost completed.
collimator・Conditioning of the cooling water system
has started.
・A new collimator was installed at theinjection part.
BranchingTo ring
Installation of New Collimator

To exhaustingline

Installation of New Collimator

The collimator has been installed without breaking vacuum, and baked
after the installation.

50 GeV Synchrotron (MR)-1
Restoration work at MR is progressing as we planned.
・ Realignment of ~400 electromagnets was completed at the end of October.
・ We are realigning beam input and output apparatuses and monitors, and connecting vacuum pipes.
・ Plumbing for RF cooling water in a sub-tunnel was completed, and we are testing the cooling water
system now.
・ We completed to increase the acceptable beam capacity of the collimator and to set new wall-typeshields in this area.
・ A new injection-kicker electromagnet is being set up
at KEK in Tsukuba.

Vacuum chamber of thenew injection-kicker
magnet (above); Mount for
the new magnet (right)

New absorbers and wall-typeshields in ring-collimator area

Materials and Life Science Experimental Facility (MLF)-1・ Restoration work of damaged exterior facilities, such as roads, helium tanks and pipingsystem, was completed.
・ Repair work and construction for thebuildings were completed.

Immediately after theearthquake

Land sank ~1 m.

Piping system around thebuilding was heavily damaged.

Immediately after theearthquake

Filled with newclot

Repaired
Restoration work ofan expansion jointin 3NBT tunnel wascompleted.

Tilted liquid He tanks
were straightened. The
surrounding road wasalso restored.

Materials and Life Science Experimental Facility (MLF)-2Restoration work goes as scheduled.
・ Sank western extension building was jacked up and leveled to the main building. Markers were re-set.
・ Re-installation of shielding blocks and construction of new beam lines in experimental halls are progressing
smoothly.
Measurement andmarking in the westernextension building →← Re-installation ofshielding block (BL17)

XY stage of BL18 wall

XY stage of BL19 wall

New beamline center
position

Beamline center position before theEarthquake
Bringing in a large-scale vacuum
scattering chamber for DNA (BL02)

Beam center displaced more than 30 mm depending on a place of the westernextension building. New plates were installed.

Neutrino Experimental Facility
Restoration work goes smoothly as scheduled.
・Repair work of exterior wall and sank roads was almost completed. Remaining work should befinished in December.
・ Electric and Superconducting magnets have been tested and conditioned since October.
・ There was no significant displacement at the target station.

CamerasforObservationof Horns

Marking at Lower
Stream of the 2nd Horn

Marking at Upper
Stream of the 3rd Horn

Displacement of Horns (mm)2nd Horn：0.0±0.3、3rd Horn： 0.3±0.3（No displacement）

Camera forobservationof Basement
We put a measuring device in ahelium tank between 2nd and 3rdhorns to label horn position.

Marking at Upper
Stream of the 1nd Horn

Marking at the Target End

Displacement at lower stream of 1st hornis <1 mm.

Hadron Experimental Facility
Restoration work is progressing as scheduled.
・ Almost all recovery work of damages around building was completed.
・ Alignment and other recovery work in the experimental hall go smoothly. Re-installationof shielding blocks continues.

Hadron Experimental Hall (North)
Restoration work nearcylinder stands wascompleted.

↑ Started to repair
distortion in thecooling water piping
systemSummary•••

Restoration work has been progressing smoothly as scheduled.
The soundness of all equipment/instruments/devices is carefully checked
through various different tests.
We have started to adjust work schedule of each section to resume beam in
December, and to reopen J-PARC to the public in January.

J-PARC Recovery Schedule （@2011.5.20）
20112011
4

Infrastructure

2012
2012
5678

Emergency Recovery

9101112123

Full Recovery Work

Beam Test
User Operation
StartLinac
RCS

Investigation
Investigation

Recovery

Alignment

BeamCommissioning

MLF User Operation

Test withelectricity

Recovery
Cooling Water

3GeV synchrotron

MR

Test withelectricity

Investigation

Recovery

Test withelectricity

NU or HD Operation

50GeV synchrotron

MLF

Investigation

Materials&Life
Experimental Facility

HD

BL Components
Extended Building

Hadron Experimental
Facility

Investigation

NU

Investigation

Neutrino Experimental
Facility

Shielding recovery

RecoveryRecovery

New Hg Target

Beam
Injection

BeamInjection
BeamInjection

MLF User Program

HD Experiment
NU Experiment