Hieno esine + minä Linac4 kiihdyttimen yläkerrassa!
October 27, 2026 at 5:56 PM
Hieno esine + minä Linac4 kiihdyttimen yläkerrassa!
A superb experience to have visited #ELENA, #LHCb, #LINAC4 & #TIER0 at #CERN up close! Many thanks to the inspiring people for showing us around. Unfortunately, due to active construction taking place at #CMS, #ATLAS & #ALICE, they were closed for visits. I will have to come back next year!
October 22, 2026 at 5:10 PM
Comments (05:46:37) Next: 2748 bunches on beam 2 to 3 TeV
quadrupole issue in Linac4, piquet called
quadrupole issue in Linac4, piquet called
June 18, 2026 at 3:47 AM
Comments (05:46:37) Next: 2748 bunches on beam 2 to 3 TeV
quadrupole issue in Linac4, piquet called
quadrupole issue in Linac4, piquet called
Comments (03:48:39) Linac4 is back
issues with SPS BQM, RF piquet on site
intervention is expected to take at least
until 07:30 am
issues with SPS BQM, RF piquet on site
intervention is expected to take at least
until 07:30 am
May 4, 2026 at 1:48 AM
Comments (03:48:39) Linac4 is back
issues with SPS BQM, RF piquet on site
intervention is expected to take at least
until 07:30 am
issues with SPS BQM, RF piquet on site
intervention is expected to take at least
until 07:30 am
Comments (03:43:48) Linac4 is back
issues with SPS BQM, RF piquet on site
intervention is expected to take at least 4 hours
issues with SPS BQM, RF piquet on site
intervention is expected to take at least 4 hours
May 4, 2026 at 1:44 AM
Comments (03:43:48) Linac4 is back
issues with SPS BQM, RF piquet on site
intervention is expected to take at least 4 hours
issues with SPS BQM, RF piquet on site
intervention is expected to take at least 4 hours
Comments (02:47:13) issues with SPS BQM, RF piquet on site
Linac4 down, RF piquet coming on site in 1 hour
(too late for physics refill)
no time estimate
Linac4 down, RF piquet coming on site in 1 hour
(too late for physics refill)
no time estimate
May 4, 2026 at 12:47 AM
Comments (02:47:13) issues with SPS BQM, RF piquet on site
Linac4 down, RF piquet coming on site in 1 hour
(too late for physics refill)
no time estimate
Linac4 down, RF piquet coming on site in 1 hour
(too late for physics refill)
no time estimate
Comments (02:46:31) issues with SPS BQM, RF piquet on site
Linac4 down, RF piquet coming on site in 1 hour
no time estimate
Linac4 down, RF piquet coming on site in 1 hour
no time estimate
May 4, 2026 at 12:46 AM
Comments (02:46:31) issues with SPS BQM, RF piquet on site
Linac4 down, RF piquet coming on site in 1 hour
no time estimate
Linac4 down, RF piquet coming on site in 1 hour
no time estimate
Comments (02:25:38) Next: refill for Physics
issues with SPS BQM, RF piquet on site
Linac4 down, RF piquet checking
no time estimate
issues with SPS BQM, RF piquet on site
Linac4 down, RF piquet checking
no time estimate
May 4, 2026 at 12:25 AM
Comments (02:25:38) Next: refill for Physics
issues with SPS BQM, RF piquet on site
Linac4 down, RF piquet checking
no time estimate
issues with SPS BQM, RF piquet on site
Linac4 down, RF piquet checking
no time estimate
Comments (11:59:21) *** STABLE BEAMS ***
Linac4 source issue (time estimate: 1h more)
XRPs in
Linac4 source issue (time estimate: 1h more)
XRPs in
August 17, 2025 at 9:59 AM
Comments (11:59:21) *** STABLE BEAMS ***
Linac4 source issue (time estimate: 1h more)
XRPs in
Linac4 source issue (time estimate: 1h more)
XRPs in
Comments (10:26:21) *** STABLE BEAMS ***
Linac4 source issue (no time estimate for dump -
at least 1h)
XRPs in
Linac4 source issue (no time estimate for dump -
at least 1h)
XRPs in
August 17, 2025 at 8:26 AM
Comments (10:26:21) *** STABLE BEAMS ***
Linac4 source issue (no time estimate for dump -
at least 1h)
XRPs in
Linac4 source issue (no time estimate for dump -
at least 1h)
XRPs in
Comments (09:45:58) *** STABLE BEAMS ***
Linac4 source issue (no time estimate for dump)
XRPs in
Linac4 source issue (no time estimate for dump)
XRPs in
August 17, 2025 at 7:46 AM
Comments (09:45:58) *** STABLE BEAMS ***
Linac4 source issue (no time estimate for dump)
XRPs in
Linac4 source issue (no time estimate for dump)
XRPs in
Comments (09:40:26) *** STABLE BEAMS ***
Linac4 source issue (no time estimate for dump)
XRPs moving back in
Linac4 source issue (no time estimate for dump)
XRPs moving back in
August 17, 2025 at 7:40 AM
Comments (09:40:26) *** STABLE BEAMS ***
Linac4 source issue (no time estimate for dump)
XRPs moving back in
Linac4 source issue (no time estimate for dump)
XRPs moving back in
Comments (05:30:00) beam back in LINAC4
June 7, 2025 at 3:30 AM
Comments (05:30:00) beam back in LINAC4
Comments (05:28:06) No beam from LINAC4
June 7, 2025 at 3:28 AM
Comments (05:28:06) No beam from LINAC4
Comments (06:58:29) Beam commissioning
No beam from LINAC4, piquet on-site
Next: access until ~12:00
(agreed activities only)
No beam from LINAC4, piquet on-site
Next: access until ~12:00
(agreed activities only)
April 15, 2025 at 4:58 AM
Comments (06:58:29) Beam commissioning
No beam from LINAC4, piquet on-site
Next: access until ~12:00
(agreed activities only)
No beam from LINAC4, piquet on-site
Next: access until ~12:00
(agreed activities only)
Comments (05:30:06) Beam commissioning
Next: aperture measurements at injection
No beam from LINAC4, piquet on-site
Next: aperture measurements at injection
No beam from LINAC4, piquet on-site
April 15, 2025 at 3:30 AM
Comments (05:30:06) Beam commissioning
Next: aperture measurements at injection
No beam from LINAC4, piquet on-site
Next: aperture measurements at injection
No beam from LINAC4, piquet on-site
The protons are circulating in so-called bunches in the LHC. Each bunch contains about 150 billion protons at injection. They are accelerated to an energy of 0.45TeV in multiple stages (LINAC4, Booster, PS and SPS) before entering the LHC.
May 16, 2025 at 11:06 PM
The protons are circulating in so-called bunches in the LHC. Each bunch contains about 150 billion protons at injection. They are accelerated to an energy of 0.45TeV in multiple stages (LINAC4, Booster, PS and SPS) before entering the LHC.
Here we see vertical septum magnets, pivotal for directing beams into the Proton Synchrotron Booster (PSB) rings.
These magnets facilitate the vertical deflection of the beam from Linac4 into the PS Booster.
These magnets facilitate the vertical deflection of the beam from Linac4 into the PS Booster.
February 23, 2026 at 7:23 AM
Here we see vertical septum magnets, pivotal for directing beams into the Proton Synchrotron Booster (PSB) rings.
These magnets facilitate the vertical deflection of the beam from Linac4 into the PS Booster.
These magnets facilitate the vertical deflection of the beam from Linac4 into the PS Booster.
The PSB is made up of four superimposed synchrotron rings, which receive beams of negative hydrogen ions from Linac4 – a linear accelerator – which started up a few weeks ago. The ions are stripped of their two electrons during injection from Linac4 into the PSB, leaving only protons.
March 10, 2025 at 8:16 AM
The PSB is made up of four superimposed synchrotron rings, which receive beams of negative hydrogen ions from Linac4 – a linear accelerator – which started up a few weeks ago. The ions are stripped of their two electrons during injection from Linac4 into the PSB, leaving only protons.