Current Status of J-PARC Facilities

September, 2011

LINAC-1
Immediately after the Earthquake

Many pipes for
supplyingcooling water
were damaged.
Outside of LINAC building is also heavily
damaged.

We are getting water from an outside firehydrant, as original cooling water system has
not yet been fixed.

Placing a temporal bridge for carrying inmaterials for repair.

LINAC-2
・ Many damages on partitions andceiling boards of the building.

Inside of underground tunnel
immediately after the Earthquake
・ Many spiles reached to a basement rock minimized adirect damage to the tunnel. However, groundwaterleaked into the tunnel and the water depth increased to
10 cm (100 tons) within two weeks after the earthquake.

・ Repairing water leaks in the tunnel is almost completed.

・ The restoration work continues.

LINAC-3
・ Fortunately, there were no severe damages on the equipment/instruments, except somemonitors, in the tunnel. Damaged monitors have already been replaced.
・ The floor level sagged 4 cm downward in the tunnel. Because accelerator cavities shouldbe aligned within ±1 mm to each other along the beam line for the operation, they havebeen leveled and realigned where necessary.
・ Restoration work on the cooling water system and power supply is going smoothly.

Cleaning work on cooling water tanks

Realigned accelerator cavities of DTL and SDTL
were tested for water-tightness.

Restoration work on power supply

3 GeV Synchrotron (RCS)-1
・ There were severe damages on many facilities around the RCS building.
・ The restoration work was started after repaved roads for carrying in materials and instruments
for the work. The work is progressing smoothly.
Immediately after
Immediately after the Earthquake
the Earthquake

The road was repaved.

The bent stage was repaired. Power has been
supplied to the RCS building.

3 GeV Synchrotron (RCS)-2
Immediately after the Earthquake

Damaged water pipes werereplaced to enable cooling.

added concrete basis

Tilted condensers were straightened after Reinforced foundation for a cooling tower (right)
Adjusting alignment of pump/motor (left)
relabeling the bases.

3 GeV Synchrotron (RCS)-3
・ No serious damages on the equipment/instruments in RCS tunnel.
・ Position of all equipment/instruments, such as electromagnet, were precisely measured.
It appeared they misaligned ~3.7 mm vertically and up to ~10 mm horizontally.
・ However, realignment work is not needed, because we can adjust a beam orbit position
with correction electromagnets.
・ The restoration of power supply system is going smoothly.
80[m]beam direction

60

Extraction
point

RCS_0240

Blue: Reference positionsof electromagnets
Red: Actual positions after
the earthquake

200Injection
point-20(Please note the magnitude ofdisplacement is amplifiedx1000.)

Amplified x1000-40-60-80-80-60-40-20020406080

50 GeV Synchrotron (MR)-1・ Repair of water leaks has been done. The facilities for electric power supply andcooling water supply have been restored as well.
・ All electromagnets (~400) are being realigned at 5 magnets/day.
・ Magnets moved more than 1 cm are realigned to change a stage position (Photos).

Jacking up an electromagnet
to make a space between
the magnet and the stage
Sometimes we need toplace an adapter to put anew longer anchor bolt.

Hanging up the magnet

Pulling out the stage to put new
longer height-adjust screws

50 GeV Synchrotron (MR)-2
・ There were no serious damages on all MR equipment/instruments, such as electromagnets.
It, however, appeared they misaligned in both vertical and horizontal directions.
・ Some electromagnets that misaligned greatly are realigned with replacing a stage and/or ananchor part.
・ Inspection of the high-frequency power amplifying system has been completed.

Amplified x2000

Red: Reference positions of electromagnets
Blue: Actual positions after the earthquake(Please note the magnitude of misalignment isamplified x2000.)

Electromagnet misalighnment in a verticaldirection

50 GeV Synchrotron (MR)-3
・ Not only restoration but also improvement/upgrade of the equipment/facility are conducted
to increase beam intensity when the operation will be resumed.

Putting new hanging
racks on ceiling for pipes
for new cooling system
to supply clear water

Materials & Life Science
Experimental Facility (MLF)-1
Immediately after the Earthquake

The road was re-opened after
filling depressions with pebbles.

A tilted He tank was removed
to repair the foundation.
Inspection by the fire department

Materials & Life Science
Experimental Facility (MLF)-2
Immediately after the Earthquake

Immediately after the Earthquake

3NBT
dropping the ground level

Putting new clay to maintainthe level

An attached building to the west side of themain MLF building sank ~20 cm. The
building is jacked up with 24 hydraulic lifters(blue). Created interspace will be filled withcement injected from holes of the floor.

Repairing cracks on the floor of 3NBT
tunnel (left), and repairing a joint wall withremoving concrete (right).

Materials & Life Science
Experimental Facility (MLF)-3
Immediately after the Earthquake

Reassembling work of shielding blocks for neutron beams inthe 2nd experimental hall (above). Inspection of the inside of
the muon beam facility after removing shielding blocks (right).
This area does not have any serious damage.

Neutrino Experimental Facility-1
Immediately after the Earthquake

AC device tilted toward adepression of a road. Manypipes were damaged

Repairing roads and plumbing
have been completed.

Realignment work of electromagnets (above) andsuperconducting magnets (below) is progressing
smoothly. We also try to improve cooling power.

Neutrino Experimental Facility-2
・ Inspection of highly radiated parts, such as a target station, is progressing
smoothly.
・ The soundness of all equipment and devices, including three horns, have beenvisually confirmed.

The soundness of Beam Dump
and Decay Volume was visuallyconfirmed. There were no waterleaks.

The 3rd horn hung by a crane for inspection (left) andthe 3rd horn in a shielding maintenance area.

Hadron Experimental Facility-1
Immediately after the Earthquake

Repairing roads and plumbing have been completed.

Electromagnets in the switchyard need
to be realigned. The work isprogressing smoothly.

Hadron Experimental Facility-2
・ After removing shields temporally, the soundness of all equipment and devices
have been confirmed.
No realignments are required.

No damages in the device
Inspection work in Hadron Hall

Summary• Restoration work of buildings and outside utilities, suchas cooling water plumbing and power supply devices,
have been progressing smoothly on schedule.
• Inspection of equipment/instruments/devices to confirm
their soundness has been almost completed. The
repairing and restoration work is in progress.
• Realignment work of electromagnets for accelerators isalso in progress.
• We are making our best efforts to complete therestoration of J-PARC on time following the recovery
schedule presented in May.

J-PARC Recovery Schedule （@2011.5.20）
20112011
4Infrastructure

2012
2012
56

78

Emergency Recovery

9101112123

Full Recovery Work

Beam Test
User Operation
StartLinacRCS

Investigation
Investigation

Alignment

Recovery

MRBeamCommissioning

MLF User Operation

Test withelectricity

Recovery

3GeV synchrotron

Test withelectricity

Cooling Water
Investigation

Recovery

Test withelectricityNU or HD Operation

50GeV synchrotron

MLF

Investigation

Materials&Life
Experimental Facility

HD

BL Components
Extended Building

Hadron Experimental
Facility

Investigation

NU

Investigation

Neutrino ExperimentalFacility

Shielding recovery

RecoveryRecovery

New Hg Target

Beam
Injection

Beam
Injection
Beam
Injection

MLF User Program

HD Experiment
NU Experiment