M4 beam line
E137094
The M4 beam line is a particle beam transport line at CERN’s Super Proton Synchrotron North Area, used to deliver high-energy beams to experimental facilities.
All labels observed (1)
| Label | Occurrences |
|---|---|
| M4 beam line canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T1166319 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: M4 beam line Context triple: [North Area of CERN SPS, hasBeamLine, M4 beam line]
-
A.
M2 beam line
M2 beam line is a high-energy particle beam facility at CERN’s Super Proton Synchrotron used to deliver intense hadron and muon beams for fixed-target experiments such as COMPASS.
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B.
K6 beam line
The K6 beam line is a dedicated particle beam transport line in CERN’s SPS North Area used to deliver high-energy secondary beams to experimental facilities.
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C.
T2 beam line
The T2 beam line is a particle beam transport line in CERN’s Super Proton Synchrotron (SPS) North Area used to deliver high-energy beams to experimental facilities.
-
D.
Linac4
Linac4 is a linear accelerator at CERN that serves as the first stage of the proton acceleration chain for the Large Hadron Collider and other experiments.
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E.
CERN AWAKE experiment beamline
The CERN AWAKE experiment beamline is a dedicated facility at CERN that studies proton-driven plasma wakefield acceleration to develop next-generation high-gradient particle accelerators.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: M4 beam line Target entity description: The M4 beam line is a particle beam transport line at CERN’s Super Proton Synchrotron North Area, used to deliver high-energy beams to experimental facilities.
-
A.
M2 beam line
M2 beam line is a high-energy particle beam facility at CERN’s Super Proton Synchrotron used to deliver intense hadron and muon beams for fixed-target experiments such as COMPASS.
-
B.
K6 beam line
The K6 beam line is a dedicated particle beam transport line in CERN’s SPS North Area used to deliver high-energy secondary beams to experimental facilities.
-
C.
T2 beam line
The T2 beam line is a particle beam transport line in CERN’s Super Proton Synchrotron (SPS) North Area used to deliver high-energy beams to experimental facilities.
-
D.
Linac4
Linac4 is a linear accelerator at CERN that serves as the first stage of the proton acceleration chain for the Large Hadron Collider and other experiments.
-
E.
CERN AWAKE experiment beamline
The CERN AWAKE experiment beamline is a dedicated facility at CERN that studies proton-driven plasma wakefield acceleration to develop next-generation high-gradient particle accelerators.
- F. None of above. chosen
Statements (44)
| Predicate | Object |
|---|---|
| instanceOf |
accelerator beam line
ⓘ
particle beam transport line ⓘ |
| connectedTo |
North Area experimental targets
ⓘ
SPS extraction line ⓘ |
| country | Switzerland ⓘ |
| energyRange | high-energy SPS beam energies ⓘ |
| environment | underground accelerator tunnel ⓘ |
| fedBy | Super Proton Synchrotron ⓘ |
| hasAbbreviationContext | M4 is a designation within the SPS North Area beam lines ⓘ |
| hasComponent |
beam diagnostics
ⓘ
beam dumps ⓘ beam instrumentation ⓘ collimators ⓘ dipole magnets ⓘ magnets ⓘ quadrupole magnets ⓘ vacuum system ⓘ |
| hasFunction |
deliver high-energy beams to experimental facilities
ⓘ
transport particle beams from SPS extraction to experimental areas ⓘ |
| hasInfrastructureType | fixed-target beam line ⓘ |
| hasLocation |
SPS North Area experimental hall
ⓘ
linked to:
North Area of CERN SPS
|
| hasPurpose |
distribute SPS beam to multiple experimental stations
ⓘ
provide configurable beam conditions for experiments ⓘ |
| locatedIn | CERN ⓘ |
| operatedBy |
CERN Accelerator and Technology Sector
ⓘ
linked to:
CERN Technology Department
CERN Beams Department ⓘ |
| ownedBy | CERN ⓘ |
| partOf |
CERN North Area
ⓘ
linked to:
North Area of CERN SPS
Super Proton Synchrotron North Area ⓘ
linked to:
North Area of CERN SPS
|
| physicsFacility | SPS North Area ⓘ |
| relatedTo |
H2 beam line
ⓘ
H4 beam line ⓘ M2 beam line ⓘ M3 beam line ⓘ |
| safetyStandard |
CERN accelerator safety procedures
ⓘ
CERN radiation protection rules ⓘ |
| supportsExperimentType |
detector R&D
ⓘ
hadron physics experiments ⓘ |
| usedBy |
CERN experimental collaborations
ⓘ
linked to:
CMS Collaboration
|
| usedFor |
fixed-target experiments
ⓘ
particle physics experiments ⓘ test-beam experiments ⓘ |
| usesBeamType |
high-energy proton beam
ⓘ
secondary particle beam ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: M4 beam line Description of subject: The M4 beam line is a particle beam transport line at CERN’s Super Proton Synchrotron North Area, used to deliver high-energy beams to experimental facilities.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.