Status Report
May, 2011

Linac #1 in May
Specific・Electric cables were partially damaged, so that electric supplies are still very limited. Low‐voltage
systems are OK though. Using low‐voltages many investigations are in progress.
・Crane on the ceiling and crane rail are distorted. Limited usage off the crane.

Acceleration Cavity•Test
Test of the vacuum. No serious problems. Mass spectroscopy detected H2O.
•Q‐value and Frequency for DTL measured. No serious problems.
•Inspection of the cavity has been continues. No serous problems.
DTL-1 Dispersion Curve (δf1とδf2)
302520δf (MHzz)

151050-5-10-15
-20
T…
T…
T…
T…
T…
T…
T…
T…
T…
T…
PC1
PC2
PC3
PC4
PC5
PC6
PC7
PC8
PC9Low power test for DTL.

Using pick‐up board ,tests for highfrequencies with low
power is tested.

Red Before the earthquake.
Blue: After the earthquake.
No significant change observed
Before and After.

Linac #2 in May
Monitors
・Many CT’s (Current Transformer) and BPM’s (BeamProfile Monitor) were damaged.
・Vacuum
Vacuum leak test for individual BPM was done.
Test for wire movement, etc performed.
・Purchase orders for damaged CT’s and BPM’s done.

Ion Source and Its Power Supplies
pp・High voltage test up to 50 kV. No big issues.

RF (incl. Klystron)

BPM (Beam Profile Monitor) extracted
from Q-Magnet. Bellow was desctroyed.

・No
No serious problems found in so far.
・Need recoveries for Crane, High Voltage Power and Cooling Water.

Air conditioning Pipeis falling down.

Measurement by laser for Klystron (10 mrad Crane rail in the Klystron Gallery
distortion toward west side was observed) .
(partial damage detected).

One room on the side.
By digging a hole, 50 cm hole (gap)
was detected.

RCS #1 in May
Road Repair
・Repair started. This place is important to fix cooling tower and electric power stations.

Electric Power Stations
・LeanedLeaned electric power supplies
supplies. Jacking up the entire floor will be triedtried.

RCS #2 in May
Water Piping
5/18

5/25

Temoprarily
fixed.
Cooling Tower
・Several places are damaged. Need to replace to a new one.
Cooling tower

Coolingtank&Supporting rods
Crackare floating.

RCS #3 in May
Electric Power Supplies
・Not fully recovered (partial recovery).
・Crane and Elevator are now working.
・Air conditioning and cooling water still take time.
time

Inside Tunnel
・Inspection continues. Spurious signals were injected to BPM (Beam Profile Monitor) andinsulations and conductance are tested. So far, no serious problems are found.
・CT (Current Transformer) was also tested by spurious signals. No serious problems were found.

BPM
SCT
DCCT

WCM

BLM

Main Ring in May
Water Leakage inside Tunnel
・Inserted urethane to stop water leak.

Urethane to stopwater leakage

Cooling Water
・Some places need to be fixed, but overall noserious problems.

Magnets
・In some dipole magnets ceramics or castings
had certain damage, as shown below. All ofthem are changed to new spares.

Casting that was broken (Dipole magnet)

Test cooling water. Arrowed are theplaces to be fixed.

Measurement of Leveling for Accelerators① Linac・Measurement of the Leveling is being done periodically. Also, measurement using laser
tracker is also being conducted.
conducted・Based on the recent leveling measurement, 1 mm drop is observed from March 31 toApril 12 and 0.2 mm drop from April 12 to 28.
・Still sinking slightly.

② RCS (3 GeV Synchrotron)
・At the joint point between Linac and RCS, which is Ｌ３ＢＴ, 1.1〜3.0mmdrop is observed.
・Degree of leaning was also measured. From place to place, this leaning is different.
・From the past measurement, inward leaning is observed.

③MR (50 GeV Synchrotron)
・This time, slow extraction was examined. No serious problems.
・＋3mm〜−5mm＋35
didisplacementlt over 300
300m didistancet
iis observed.
bd IIn particular,
ti l a llarge
displacement was observed in the place where a crack is observed.
・In the past the displacement was ±2mm over the entire 〜1600m. Therefore, thedisplacementpthis time is larger
g than this ±2mm.

MLF #1 in May
3NBT (RCS‐MLF Beamline））
・From RCS (3 GeV Synchrotron）, MLF is dropped by 12mm.

３NBT tunnel

Neutron Source Beam Shutter
・Shutter has some problems.
・Due to strong earthquake, bolts were either damaged or unscrewed.

Inspection of Shutter
blocks with crane.

MLF #2 in May
Movement of Shielding Walls
・ BL20… Removal of the shield was successfully done.

Shield for
BL20

Operation of how
removal was done.

Muon Target
・By removing shield wall, the interior was inspected. Nog was observed.
serious damage

Low Temperature Hydrogen System・Inspection is in progress, as shown below.

Interior for muon target.

Neutrino in May
Magnet・Both superconducting magnets and normal magnets have no serious problems.
・However, 3.5 mm drop for normal conducting magnet at the joint point. Also, a gradual drop up
to 2.5mm for superconducting
pg magnets.
gTarget Station
・Helium has not leakages.
・Further investigation
gwill be done after air circulation.
・Target and the First Horn will be replaced. The Second and Third Horn is presently inspected.

Outside Areas・Many
Man repairs for roads
roads, etcetc. are being in progress
progress. See belo
below pictpictures.
res

On‐Site Detector
・Elevator
El t anddC
Crane are stilltill nott working.
ki・Interior inspection will be done after the arrival of non‐Japanese participants.

Hadron #1 in May
Cooling Water
Water, Air Conditioning
Conditioning, Electricity
・Cooling water are now working. Electricity is also working.
・Air conditioning is now possible for 24 hours.

Cracks for cooling water

Buildings・Roads
d were repairedd at theh entrance hhall.
ll Crane isworking.

Experimental Hall・Part of the shields was removed. Currently working toprepare temporary space for shields.
・Transfer primary beam line: about 16 mm drop after 〜
35m length.
length・〜4mm drop observed at the switchyard. Alignment isplanned in the future.

Cooling tower and cooling pipe (bothbent, but possible to use as it is.)

Hadron #2 in May
Removal of Shield around the Target

・Inspection is in progressaround the target
target.

Recovery Work for Swtchyard

・Removal of Vacuum pipes.

・Magnets were also removed.

Summary in May
Linac
・Inside Building: Damage is large for Crane, etc
・For Accelerator: Inspection and alignment are in progress.
RCS (3 GeV Synchrotron)
・Recovery of the road around the 3 GeV started.
・Partial recovery for electric powers. Inspection in progress inside.

Inspection off crane railon the ceiling at Linac.
Linac

MR (50GeV Synchrotron)・Cooling water and air condition are back on. Repair of road to allow big vehicle.
・Acceleration
Acceleration cavity and beam monitor: Inspection in progress.
progress
MLF (Materials and Life Experimental Hall)
・Removal of shield. Continuation of inside inspection.
・Inspection and measurements inside.
Neutrino Experimental Hall・Repair
R i roads
d aroundd theh hall.
h ll
・Water cooling test. Vacuum test.
Hadron Experimental Facility
・Repair roads. Cooling water recovered.
・Removal of shields. Inspection of various instruments.

Repair work for roads
to allow big vehicle

2011.5.20

On J‐PARC
J PARC Recovery Schedule
J‐PARC Center
Since the earthquakeq
occurred on March 11,, we,, members of the J‐PARC center
team, have dedicated to promote an action program to recover the facility
performance which suffered from damage due to a tremendous strong quake.
Right after the event, we have worked on in creating a recovery master schedule.
Although the present plan is by one week later than anticipated, we came to a
result for the master plan which gives a goal for endeavor from now on, as follows:
1) We will confirm the facility recovery by a beam injection
injection.
2) User program will be restarted with beam time of about 50 days
that will be provided to users until the end of March 20122012. (withinJapanese fiscal year of 2011)
Please see a time chart of the schedule for the recovery on the next page.
page* Note that, the schedule is assumed to be valid when the budget requested in eachaction program is delivered on time.
* In addition, the schedule is strongly influenced by the progress of infrastructural
recovery, e.g., access roads, electric power supplies, cooling water supplies, etc.

J‐PARC Recovery Schedule （@2011.5.20）
2011
4Infrastructure

2012
56789

Emergency Recovery

101112123Full Recovery Work

Beam Test
User Operation Start

Linac
RCS

Investigation
Investigation

Recovery

Alignment

Test withelectricity
Test withelectricityy

Recovery

BeamCommissioning

MLF User Operation

Cooling Water

3GeV synchrotron
Investigation

MRRecovery

Test withelectricity

NU or HD Operation

50GeV synchrotron

MLF

Investigation

Materials&Life
Experimental Facility

HD

BL Components

New Hg Target

MLF User Program
Beam Injection

E tended Building
Extended
B ildin

Hadron Experimental
Facility

Investigation

NU

Investigation

Neutrino Experimental
Facility

Shielding recovery

RecoveryRecoveryBeam Injection HD ExperimentBeam Injection NU Experiment