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Beam status

Beam status

MCR News

05 March 2026 00:26
    TS2 USERS - The issue that was preventing TS2 beamlines from collecting
    data has now been resolved.


04 March 2026 22:19
    Beam is back at @ 22:00. Machine will be left at this level overnight,
    tuning will resume early tomorrow.
    
    An expert is also looking into the problem TGT2 users are having with data
    collection.


04 March 2026 22:19
    Beam is back at @ 22:00. Machine will be left at this level overnight,
    tuning will resume early tomorrow.
    
    An expert is also looking into the problem TGT2 users are having with data
    collection.


04 March 2026 21:03
    All issues have been fixed, machine physicists currently working on setup.
    Update @ 22:00


04 March 2026 19:00
    We are still experiencing timing issues, experts are working on the
    issues. Update @ 21:00


04 March 2026 16:27
    All maintenance day work has been completed. We are currently having a
    timing issue which experts are working on. Once issue has been resolved
    setup will start.
    Update @ 18:00


04 March 2026 12:39
    Maintenance day work is going well. We have a new Ion Source in and
    running with a good output. There are a few bits of work still to be
    buttoned up. We will update MCR news when we are close to completing these.


04 March 2026 07:11
    Please be reminded that the machine will be going off at 08:30 today for
    maintenance day.


04 March 2026 03:26
    Beam restored to TS1


04 March 2026 03:21
    The EPB1 power supply is operational. We are changing machine modes to run
    to both target stations and will restore beam to TS1 within 15 minutes.


04 March 2026 02:41
    TS1 users:
    
    Our equipment specialist is working on the problematic EPB1 power supply.
    Update at 03:15 Hours.


04 March 2026 01:32
    We have an issue with an EPB1 power supply. An equipment specialist is on
    their way to site to investigate. We are configuring the machine for TS2
    running. Update at 02:30 if beam is not restored by then.


03 March 2026 17:29
    Machine update:-
    
    Beam restored to both target stations.


03 March 2026 16:39
    Machine update:-
    
    We have a problem with the fundamental RF systems in the Synchrotron.
    Experts are assisting with repairs.  Update 17:30hrs.


03 March 2026 13:27
    Base rate beam established back to TS1. Beam rep rate will be increased
    slowly over the next 10-15 minutes.


03 March 2026 12:36
    Target staff are having issues with the methane cooldown. They have
    indicated that it will take in the region of another 2-4 hours. Update at
    15:00hrs.


03 March 2026 10:14
    Target staff have managed to get the methane moderator back into liquid
    and it is cooling down. Update at 12:00hrs.


03 March 2026 06:59
    Attention TS1 Users:
    
    We have an Issue with the TS1 Methane Moderator and have disabled Beam
    whilst we investigate. At 06:25 Hours there was an issue and the Moderator
    started warming up. We have two Target Specialists on site investigating
    and they have estimated beam will be off for two to six Hours whilst the
    system recovers to operational temperatures.


02 March 2026 18:00
    Machine update:-
    
    Beam restored to both target stations.


02 March 2026 17:34
    Machine update:-
    
    We are suffering with a fault on Chip-IR's beam line radiation monitor
    holding off the beam, experts are on site trying to rectify the problem.


28 February 2026 14:49
    TS2 Users:
    
    Our Target Specialist is working on the issue with the CH4 Decoupled
    moderator. We will endeavour to restore beam as soon as we can. Update at
    15:30.


28 February 2026 13:53
    TS2 Users:
    
    Beam is currently off to allow the CH4 Decoupled Moderator temperature to
    recover because the Charge Change stalled. A Target specialist is on their
    way to site to address the issue.


27 February 2026 13:59
    Beam ON


27 February 2026 12:37
    The main magnet power supply control system is working again. However,
    during the failure of the main magnet system some of the synchrotron RF
    systems suffered a failure. As a result of this we now need to gain access
    into the outer synchrotron for RF equipment experts to investigate the
    failed RF systems further.
    
    Update @ 14:00.


27 February 2026 11:44
    BEAM OFF - We are experiencing an issue with the main magnet power supply
    control system. Equipment experts are currently looking into this.
    
    Update @ 12:30.


27 February 2026 06:07
    Machine update:-
    
    Beam restored to target station 1, after the Methane moderator problem.


27 February 2026 04:08
    Machine update:-
    
    Target staff have managed to warm up the cryogenerator and then start the
    cool down of the Methane Moderator. It will take a few more hours before
    we find if these repairs have been successful. Next update 06:00hrs.


27 February 2026 01:58
    Machine update:-
    
    Machine experts are on site trying to warm up the cryogenerator that
    appears to have frozen up, this process will take another couple of hours.
    Next update 04:00hrs.


27 February 2026 00:57
    TS1 currently unavailable due to problems with the Methane moderator
    equipment experts are on route to investigate. Update to follow at 02:00 am


26 February 2026 19:54
    Beam restored to both Target Stations at 19:40 Hours.


26 February 2026 18:44
    Machine Physicists are working through a number of issues with higher than
    acceptable beam loss. We will endeavour to restore full rep rate beam to
    targets as soon as we can.


26 February 2026 17:28
    All equipment is back on. We are beaming at base rate to both target
    stations whilst our Physicists carry out some machine set up. We will
    increase timing when beam losses are at an acceptable level.


26 February 2026 16:45
    The Manifold causing the water leak in the Outer Synchrotron has been
    replaced. The water leak has caused a problem with a beam loss monitor
    which our diagnostics specialists are currently attempting to repair. We
    are running up the Main Magnet Power Supply and if no further access is
    required to the Outer Synch we should be able to restore beam in the next
    hour.


26 February 2026 14:01
    After gaining access to the outer synchrotron we have discovered a water
    leak on a magnet manifold. Equipment experts are now in the process of
    replacing the damaged manifold.
    
    Update @ 15:30.


26 February 2026 13:20
    Beam is off as we need to access the outer synchrotron to investigate a
    suspected water leak.
    
    Update @ 14:00.


25 February 2026 14:10
    Beam back on running as normal to both targets @ 14:05


25 February 2026 13:14
    Works on the magnet with the earth leakage fault has completed. Currently
    locking up outer synch and MMPS run up will start shortly.
    Update @ 14:00


25 February 2026 11:57
    The Linac PSU has been successfully fixed. Work continues on the Magnet
    with the earth leakage issue, currently approximately 3/4 complete. Works
    should be completed around 13:00, MMPS run up will follow.
    Update @ 13:30


25 February 2026 10:06
    We have a fault with one of the linac PSU's. While we're off with this we
    will also fix the magnet earth leakage issue in the outer synch.
    Update @12:00


24 February 2026 18:23
    Beam ON


24 February 2026 18:05
    BEAM OFF - We are experiencing an issue with a power supply in the Linac.
    Equipment experts are on site and investigating the cause of the failure.
    
    Update @ 18:30.


24 February 2026 05:05
    Machine update:-
    
    MS Beam restored to both target stations @ 05:00hrs.


24 February 2026 03:00
    Machine update:-
    
    A new Ion source has been installed and we are now locking up the
    Injector. Machine setup then needs to be completed before beam can be
    restored to the Target stations. Next update 04:30hrs


24 February 2026 00:58
    Machine update:-
    
    Experts have attended site and confirmed a failing Ion source. Therefore
    we will be off for approximately 2hrs whilst we perform a change. Update
    03:00hrs.


24 February 2026 00:30
    Machine update:-
    
    Unfortunately the output from the Ion source has dropped approximately 1hr
    ago. Measures to increase the output have failed, so experts are on route
    to help with repairs,  We will be running at lower levels whilst
    investigations continue, with a possibility of beam off for repairs. 
    Updates will follow.


22 February 2026 14:17
    W1 CHIPIR and W5 IMAT cleared for beam.


22 February 2026 03:50
    Beam to Target Station 1 has been temporarily disabled. We have issues
    with the EPB1 Beam Loss Monitors. We are calling an equipment specialist
    for advice.


22 February 2026 03:10

ISIS operating schedule

Find out about our upcoming operating schedule. Cycles begin/end at 08:30 on the date specified.
CycleStartEndTarget station(s)Maintenance day(s)Comments
2025/517 Feb 202627 Mar 2026TS1 & TS24 Mar 2026-
2026/1​05 May 202612 Jun 2026​TS1 & TS2​20 May 2026-
2026/2----Cycle cancelled
2026/3​15 Sep 2026​23 Oct 2026TS1 & TS2​30 Sep 2026-
2026/4​17 Nov 202618 Dec 2026​TS1 & TS2​02 Dec 2026-
2026/50​2 Feb 2027​12 Mar 2027TS1 & TS2TBC-

ISIS operating schedule - future years

From April 2026 to March 2027, we expect to run four​ cycles which will be allocated in proposal rounds 26-1 (deadline October 2025) and 26-2 (deadline April 2026)​.

We are currently anticipating having an extended shutdown for accelerator and beamline work from March to early September 2027. This would mean no proposal round in October 2026, and a round in April 2027 to allocate time from September 2027 to March 2028.

Machine physics schedule

Accelerator physics experiments are performed before and after each user run. The latest schedule can be seen by clicking this text.

Date Shift Mode Rep Rate Task Contacts Notes
3/2/26
Tuesday
00:00–08:30 5
3/2/26
Tuesday
08:30–14:00 5 MS/32 Initial Injector Setup HVC, SK Intermittent beam to IHBS2
3/2/26
Tuesday
14:00-16:30 5 MS/32 Commissioning IPM 11, 12, 13 SAF, SK Intermittent beam to IHBS2
3/2/26
Tuesday
16:30–00:00 5 MS/32 Initial Injector Setup and HEDS Model Measurements BK Intermittent beam to IHBS2
4/2/26
Wednesday
00:00–08:30 5
4/2/26
Wednesday
08:30–12:30 5 MS/32 Orbit Response Matrix Measurements REW, EA Storage Ring Mode
HEDS Chopper Required
4/2/26
Wednesday
12:30-14:30 5 MS/32 Extract Septum Scans in Bunched Storage Ring Mode REW Bunched Storage Ring Mode
4/2/26
Wednesday
14:30-18:30 5 MS/32 AC Dipole Testing CJ, DPdB Storage Ring Mode
4/2/26
Wednesday
18:30–00:00 5 MS/32 Impedance Measurements DPdB Storage Ring Mode
5/2/26
Thursday
00:00–08:30 5 MS/32 Run up MMPS DC and AC, turn on RF Crew
5/2/26
Thursday
08:30–16:30 5 MS/32 Initial Synchrotron Setup BK, SK
5/2/26
Thursday
16:30–00:00 5 MS/32 Synchrotron Setup CMW, EA
6/2/26
Friday
00:00–08:30 5 MS/32
6/2/26
Friday
08:30–16:30 5 MS Synchrotron Setup & LEBT optimisation tests REW, HR, RB
6/2/26
Friday
16:30-18:30 5 MS SCPM Tests DAb
6/2/26
Friday
18:30–00:00 5 MS Synchrotron Setup & EPB Alignments HVC
7/2/26
Saturday
00:00–08:30 5 MS
7/2/26
Saturday
08:30-16:30 5 MS Synchrotron Setup REW, SK
7/2/26
Saturday
16:30–00:00 5 MS Synchrotron Setup DJA
8/2/26
Sunday
00:00–08:30 5 MS
8/2/26
Sunday
08:30–16:30 5 MS Synchrotron Setup HVC, EA
8/2/26
Sunday
16:30–00:00 5 MS Synchrotron Setup BK
9/2/26
Monday
00:00–08:30 5 MS
9/2/26
Monday
08:30–12:30 5 MS Synchrotron Setup HVC
9/2/26
Monday
12:30-16:30 5 MS 1RF Bucket Shape Tests AS, DJA, (HVC)
9/2/26
Monday
16:30–00:00 5 MS RCS Chopped Beam dQ/dI Measurements HR HEDS Chopper Required
10/2/26
Tuesday
00:00–08:30 5 MS
10/2/26
Tuesday
08:30–16:30 5 MS RF Setup & Aperture Measurements AS, ISKG, HVC
10/2/26
Tuesday
16:30–00:00 5 MS Synchrotron Setup DJA
11/2/26
Wednesday
00:00–08:30 5 MS
11/2/26
Wednesday
08:30–14:00 5 MS Synchrotron Setup HVC, HR
11/2/26
Wednesday
14:00-16:30 5 MS Bunch Compression Setup (Theta Method) BK, AS
11/2/26
Wednesday
16:30–00:00 5 MS Synchrotron Setup CMW
12/2/26
Thursday
00:00–08:30 5 MS
08:30–14:00 5 MS Synchrotron Setup HVC, SK
12/2/26
Thursday
14:00-16:30 5 MS Diagnostics Measurements: Intensity monitoring, TS2 BLMs
TS-1 Timing Tests
JFG
CS
12/2/26
Thursday
16:30–00:00 5 MS Synchrotron Setup BK, EA
13/2/26
Friday
00:00–08:30 5 MS
13/2/26
Friday
08:30–16:30 5 MS Synchrotron Setup, incl. Halo steering tests REW, DK, IF
13/2/26
Friday
16:30-18:30 5 MS LEBT Space Charge Compensation Tests EF, OT
13/2/26
Friday
18:30–00:00 5 MS Synchrotron Setup & Chopped Injection Scan HVC HEDS Chopper Required
14/2/26
Saturday
00:00–08:30 5 MS
14/2/26
Saturday
08:30–16:30 5 MS Synchrotron Setup BK
14/2/26
Saturday
16:30–00:00 5 MS Synchrotron Setup DJA
15/2/26 Sunday 00:00–08:30 5 MS
15/2/26
Sunday
08:30–16:30 5 MS Synchrotron Setup HVC
15/2/26
Sunday
16:30–00:00 5 MS Beamline Surveys HP Section

Previous cycles

CycleStartEndTarget station(s)Maintenance day(s)Comments
2025/418 Nov 202519 Dec 2025​​TS1 & TS203 Dec 2025
2025/3 ​09 Sep 2025 17 Oct 2025​​​TS1 & TS2 ​24 Sep 2025
2025/2​​01 Jul 2025​08 Aug 2025​​TS1 & TS216 Jul 2025Cycle cancelled
2025/1​29 Apr 202506 Jun 2025​​​TS1 & TS2​​14 May 2025
2024/5​18 Feb 2025​​28 Mar 2025​​TS1 & TS205 Mar 2024
2024/419 Nov 2024​​20 Dec 2024​​TS1 & TS2​​​04 Dec 2024​
2024/317 Sep 202420 Dec 2024TS1 & TS204 Dec 2024
2024/209 Jul 202428 Mar 2025TS1 & TS205 Mar 2024
2024/123 Apr 202431 May 2024TS1 & TS208 May 2024
2023/513 Feb 202422 Mar 2024TS1 & TS228 Feb 2024
2023/414 Nov 202319 Dec 2023TS1 & TS229 Nov 2023
2023/319 Sep 202320 Oct 2023TS1 & TS204 Oct 2023
2023/227 Jun 202304 Aug 2023TS1 & TS212 Jul 2023
2023/125 Apr 202326 May 2023TS2 Only
(TS1 Commissioning)
10 May 2023