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Beam status

Beam status

MCR News

14 October 2026 02:34
    Beam ON


14 October 2026 02:07
    A power supply has gone faulty in one of the linac modulators. Crew are
    just in the process of changing it. Update at 02:45.


12 October 2026 05:31
    Beam ON


12 October 2026 05:24
    We are experiencing an issue with one of the TS1 RGA's and we are in
    contact with the on-call equipment expert regarding this.
    
    Update @ 06:00.


09 October 2026 23:10
    Beam ON


09 October 2026 22:46
    The Linac modulator is back on but we are having issues controlling the
    tank phase. Beam is expected to be intermittent whilst experts investigate
    the cause of this.


09 October 2026 21:33
    BEAM OFF - Equipment experts are working on a fault with one of the Linac
    modulators. The issue is expected to be fixed shortly.


09 October 2026 17:29
    Beam on.


09 October 2026 16:45
    The Ion Source has been fitted and is running. Machine Physicists are in
    attendance setting up the Injector. Update at 17:30


09 October 2026 14:34
    The outcome of the investigation is that the ion source will need to be
    replaced. This is expected to take approximately 3 hours.


09 October 2026 14:28
    We are currently experiencing an issue with the ion source. An expert is 
    investigating the issue, and a further update will be provided shortly.


09 October 2026 09:26
    Intermittent beam whilst we address issues with Injector Intensity trips.


09 October 2026 09:18
    Beam on to both Target Stations.


09 October 2026 08:30
    The Ion source has been run up. Once the Injector has been run up we will
    need some time for machine set up. Update at 09:15.


09 October 2026 07:42
    The Ion source has been replaced and one of our Ion source specialists is
    currently running it up. If all goes well we will need some time for
    machine set up. Update on progress at 08:30 Hours.


09 October 2026 05:59
    The ion source will be replaced. An update will be provided at 7:30 AM.


09 October 2026 05:53
    We are currently experiencing an issue with the ion source, which is under
    investigation by a specialist. I will update shortly of the result


08 October 2026 23:26
    Issues resolved, Beam back on at 23:00


08 October 2026 22:51
    Machine update:-
    
    We are suffering with high injection losses. Machine specialists are
    investigating. Update at midnight.


08 October 2026 08:38
    Our equipment specialist is still diagnosing the fault with TS1 RGA's.
    Update at 09:30 Hours.


08 October 2026 07:49
    We are waiting for an update from our equipment specialist about the comms
    issues with Target Station 1 RGA. Both RGA's are currently holding us off
    with machine interlocks. Beam will continue running to TS2 whilst
    investigations continue. Update at 08:30 Hours.


08 October 2026 06:51
    There is an issue with one of the Target 1 systems. Expert on route to
    investigate. Beam has been switched to Target 2 only running for now.
    Update @ 07:45


07 October 2026 14:31
    We are experiencing controls issues that may affect beam line instruments.
    Controls experts are working on the system and estimate that this will be
    resolved by 15:00hrs.


07 October 2026 08:55
    User Coffee and Cake: 3:00pm today, TS2 Foyer. All welcome!


06 October 2026 15:03
    Beam Off - We are experiencing an issue with water flow in the Linac.
    Equipment experts are investigating the cause of this. We are hoping this
    issue will be resolved quickly and beam should be back on shortly.


04 October 2026 17:55
    Machine update:-
    
    Beam restored to both target stations at 17:35hrs.


04 October 2026 17:14
    Machine update:-
    
    We have a problem with the Extract Septum magnet continually tripping on
    over temperature. We have consulted with experts and they are on route to
    assist with repairs. Next update 18:00hrs.


04 October 2026 04:11
    We have resolved the waterflow issue. We now have an issue with one of the
    kicker power supplies. Update at 05:30.


04 October 2026 03:17
    We are currently experiencing a water flow issue on the extract septum
    magnet circuit. Investigations are underway. Update at 04:00 hrs


02 October 2026 15:33
    BEAM ON to both targets


02 October 2026 15:04
    Machine update:-
    
    Machine reconfigured to run to TS2 only while the issue with Intermediate
    target is addressed.


02 October 2026 14:24
    Machine update:-
    
    BEAM OFF - We currently have an interlock issue on the Intermediate target
    - Experts investigating - Update at 15:00


02 October 2026 07:58
    Machine update:-
    
    Beam back on to both target stations.


02 October 2026 07:56
    MAchine update:-
    
    Unfortunately we had a problem with the charge change on Target 2, which
    held ISIS off with machine interlocks. Beam was re-established to Target 1
    whilst repairs were made. The fault has now been rectified, and we will be
    converting back to beam to both Targets momentarily.


02 October 2026 07:07
    We are now investigating a problem with Target 2 interlocks. Update at
    07:30.


02 October 2026 06:24
    Our Physicists are still working on the machine setup issues. Update at
    07:15 Hours.


02 October 2026 05:18
    We are still having set up problems. One of our Machine Physicists is
    working on injector setup. Update at 06:00 Hours.


02 October 2026 04:49
    All equipment is operational. We are having a few issues with machine
    setup. Update at 05:30 Hours.


02 October 2026 03:40
    The Ion source is running. We are in the process of locking up and running
    up the Injector. Once we confirm the Ion source output is good we will do
    some machine setup before restoring beam. Update at 04:30 Hours.


02 October 2026 01:56
    The Ion source has been removed and there was a partial blockage which has
    been cleaned. We now have an issue with vacuum and are waiting for a
    specialist to arrive. Once this is resolved the Source can be refitted and
    run up. Update when we have more information.


02 October 2026 00:08
    We have a problem with the Ion Source which appears to have a partial
    blockage. An equipment specialist is coming in to assist with removal and
    cleaning (or replacement). This normally takes around 3 Hours. Update at
    04:00 Hours.


30 September 2026 14:26
    MS beam restored to both target stations.


30 September 2026 08:30
    Beam off for the start of maintenance day.


26 September 2026 23:22
    Beam back on @23:00 slightly lower than before Ion Source issue. Tuning
    will continue.


26 September 2026 22:44
    Setup is progressing slowly. Having slight diags issue while setting up.
    Update @23:30


26 September 2026 21:12
    Ion source is now up and running well. Currently working on the setup of
    the machine.
    Update @22:30


26 September 2026 18:49
    The equipment expert found a small blockage in the ion source and decided
    it was best to replace it for a new one. The replacement ion source is now
    being run up. Once this is done machine set up operations can begin.
    
    Update @ 21:00.


26 September 2026 17:03
    The equipment expert has fixed the issue with the ion source hydrogen flow
    and the ion source was run up again. However, the output was too low. The
    equipment expert is now removing the ion source to inspect it for a
    blockage. If one is found they will attempt to remove the blockage and run
    the ion source up again. If no blockage is found the ion source will be
    replaced. 
    
    Update @ 19:00.


26 September 2026 15:03
    The issues with the ion source are ongoing. Equipment experts are on site
    and investigating the cause of the hydrogen failure.
    
    Update @ 17:00.


26 September 2026 14:01
    We are experiencing an issue with the ion source hydrogen flow and we are
    in contact with equipment experts.
    
    Update @ 15:00.


26 September 2026 13:02
    The LEBT beamstop bellows have been replaced, the ion source has been
    re-inserted and we are currently in the process of running it up. Once
    this is done we will need to perform beam set up operations.
    
    Update @ 14:00.


26 September 2026 10:09
    Vacuum experts have confirmed that the LEBT beam stop bellows has failed.
    Mechanical experts are on site and will now perform a bellows replacement.
    To do this the ion source will need to be removed and then replaced once
    the work is completed. 
    
    Update @ 13:00.


26 September 2026 08:57
    We are experiencing an issue with the LEBT beam stop vacuum. An expert is
    on route to site to investigate further.
    
    Update @ 10:00.

ISIS operating schedule

Our upcoming operating schedule. Cycles begin/end at 08:30 on the date specified

Cycle Start End Target station(s) Maintenance day(s) Comments
2026/3 15 Sep 2026 23 Oct 2026 TS1 & TS2 30 Sep 2026 —
2026/4 17 Nov 2026 18 Dec 2026 TS1 & TS2 02 Dec 2026 —
2026/5 02 Feb 2027 25 Mar 2026 TS1 & TS2 17 Feb & 10 Mar 2027 —
LONG SHUTDOWN
2027/1 16 Nov 2027 17 Dec 2027 TS1 & TS2 1 Dec 2027 —
2027/2 22 Feb 2028 31 Mar 2028 TS1 & TS2 8 Mar 2028 —

ISIS operating schedule - future years

We plan to have an extended shutdown for accelerator and beamline work from March to October 2027.  The next proposal access call will open in March 2027 to allocate time from November 2027 to March 2028.

Machine physics schedule

Accelerator physics experiments are performed before and after each user run. Expand this section to see the latest schedule.

Date Shift Mode Rep Rate Task Contacts Notes
31/8/26

Monday

00:00–08:30 4B MS/32
08:30–16:30 4B MS.32 Initial Injector Setup

IPM1-3 commissioning

BK, SK
16:30–00:00 4B MS/32 Initial Injector Setup

IPM1-3 commissioning

HVC Injector and HEDS quad setup
1/9/26

Tuesday

00:00–08:30 4B MS/32
08:30–16:30 4B MS/32 Initial Synchrotron Setup REW, EA Injector and HEDS quad setup
16:30–00:00 4B MS Initial Synchrotron Setup DJA
2/9/26

Wednesday

00:00–08:30 4B MS
08:30–14:00 4B MS Synchrotron Setup

EPB2 Alignment

HVC, CJ
14:00-16:30 4B MS RF Setup AS
16:30–00:00 4B MS Synchrotron Setup REW, HR
3/9/26

Thursday

00:00–08:30 4B MS
08:30–14:00 5 MS, MS2/8 Synchrotron Setup

EPB1 Alignment

BPM Acceptance Tests

HVC, SK, KF HEDS Chopper Required
14:00-16:30 5 MS, MS2/8 SP6 Bump Tests SK HEDS Chopper Required
16:30–00:00 5 MS Synchrotron Setup CMW, EA
4/9/26

Friday

00:00–08:30 5 MS
08:30–16:30 5 MS Linac FFDD->FODO studies SA, REW
16:30-18:30 5 MS RF Setup AS
18:30–00:00 5 MS Synchrotron Setup HVC, JBL Final focus investigations
5/9/26

Saturday

00:00–08:30 5 MS
08:30–16:30 5 MS/32 RFQ LLRF Control Tests AS
16:30–00:00 5 MS/32 High Intensity Running DJA
6/9/26

Sunday

00:00–08:30 5 MS/32
08:30–16:30 5 MS/32 Half-integer resonance studies CMW, HVC SRM, HEDS Chopper Required
16:30-20:30 5 MS/32 Tune Scan EA, HVC SRM
20:30–00:00 5 MS/32 Schottky measurements CJ SRM, HEDS Chopper Required
7/9/26

Monday

00:00–08:30 5 MS/32 (run on if required) CJ SRM, HEDS Chopper Required
08:30–16:30 5 MS/32 Space charge studies REW, FS BSRM
16:30–00:00 5 MS/32 AC Dipole operation for resonant driving term CJ BSRM
8/9/26

Tuesday

00:00–08:30 5 MS/32
08:30–14:00 5 MS Synchrotron Setup

HEDS Chopper Synchronisation Tests

HVC, OC, DK HEDS Chopper Required
14:00-16:30 5 MS TS2 Halo Checks AB, RG, Crew
16:30–00:00 5 MS Synchrotron Setup CMW, HR
9/9/26

Wednesday

00:00–08:30 5
08:30–16:30 5 MS Diagnostics Testing (EPB1 BLM Head Amps, EPB Intensity Monitors, EPB2 MUXs, R0IM testing) JFG (HVC)
16:30–00:00 5 MS Synchrotron Setup REW, SK
10/9/26

Thursday

00:00–08:30 5 MS
08:30–14:00 5 MS Synchrotron Setup

EPB steering magnet criticality checks

HVC, HR, SG +TC105 investigations with SG if possible
14:00-16:30 5 MS LEBT Optimisation & Phasensonde Training Data REW, RB, IF
16:30–00:00 5 MS Synchrotron Setup DJA
11/9/26

Friday

00:00–08:30 5 MS
08:30–18:30 5 MS Synchrotron Setup REW, EA
18:30–00:00 5 MS Synchrotron Setup HVC
12/9/26

Saturday

00:00–08:30 5 MS
08:30–16:30 5 MS Synchrotron Setup EA, SK
16:30–00:00 5 MS High Intensity Running DJA
13/9/26

Sunday

00:00–08:30 5 MS
08:30–16:30 5 MS High Intensity Running HVC
16:30–00:00 5 MS Radiation Surveys HP Section

Previous cycles

Select to see prevous ISIS cycle dates

 

Cycle Start End Target station(s) Maintenance day(s) Comments
2026/2 — — — — Cycle cancelled
2026/1 05 May 2026 12 Jun 2026 TS1 & TS2 20 May 2026
2025/5 17 Feb 2026 30 Mar 2026 TS1 & TS2 4 Mar 2026
2025/4 18 Nov 2025 19 Dec 2025 TS1 & TS2 03 Dec 2025
2025/3 09 Sep 2025 17 Oct 2025 TS1 & TS2 24 Sep 2025
2025/2 01 Jul 2025 08 Aug 2025 TS1 & TS2 16 Jul 2025 Cycle cancelled
2025/1 29 Apr 2025 06 Jun 2025 TS1 & TS2 14 May 2025
2024/5 18 Feb 2025 28 Mar 2025 TS1 & TS2 05 Mar 2024
2024/4 19 Nov 2024 20 Dec 2024 TS1 & TS2 04 Dec 2024
2024/3 17 Sep 2024 20 Dec 2024 TS1 & TS2 04 Dec 2024
2024/2 09 Jul 2024 09 Aug 2024 TS1 & TS2 05 Mar 2024
2024/1 23 Apr 2024 31 May 2024 TS1 & TS2 08 May 2024
2023/5 13 Feb 2024 22 Mar 2024 TS1 & TS2 28 Feb 2024
2023/4 14 Nov 2023 19 Dec 2023 TS1 & TS2 29 Nov 2023
2023/3 19 Sep 2023 20 Oct 2023 TS1 & TS2 04 Oct 2023
2023/2 27 Jun 2023 04 Aug 2023 TS1 & TS2 12 Jul 2023
2023/1 25 Apr 2023 26 May 2023 TS2 Only
(TS1 Commissioning)
10 May 2023