Arm2 detector
E29937
The Arm2 detector is one of the forward calorimeter arms of the LHCf experiment at CERN, designed to measure neutral particles produced at very small angles in proton–proton collisions to improve models of cosmic-ray air showers.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Arm2 detector canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T230780 — 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: Arm2 detector Context triple: [LHCf, hasSubsystem, Arm2 detector]
-
A.
Arm1 detector
The Arm1 detector is one of the forward calorimeter arms of the LHCf experiment at CERN, designed to measure neutral particles produced at very small angles in proton–proton collisions to improve models of cosmic-ray air showers.
-
B.
RICH detector
The RICH detector is a ring-imaging Cherenkov device used in the NA62 experiment at CERN to identify charged particles by measuring the Cherenkov light they emit.
-
C.
Forward Multiplicity Detector
The Forward Multiplicity Detector is a specialized ALICE experiment subdetector at CERN designed to measure charged-particle multiplicities at very forward angles in high-energy collisions.
-
D.
Transition Radiation Detector
The Transition Radiation Detector is a particle physics instrument that identifies high-energy charged particles—especially electrons—by detecting the X-ray photons they emit when crossing boundaries between materials at relativistic speeds.
-
E.
Time Projection Chamber
The Time Projection Chamber is a large gaseous detector used in particle physics experiments to track and identify charged particles in three dimensions with high precision.
- 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: Arm2 detector Target entity description: The Arm2 detector is one of the forward calorimeter arms of the LHCf experiment at CERN, designed to measure neutral particles produced at very small angles in proton–proton collisions to improve models of cosmic-ray air showers.
-
A.
Arm1 detector
The Arm1 detector is one of the forward calorimeter arms of the LHCf experiment at CERN, designed to measure neutral particles produced at very small angles in proton–proton collisions to improve models of cosmic-ray air showers.
-
B.
RICH detector
The RICH detector is a ring-imaging Cherenkov device used in the NA62 experiment at CERN to identify charged particles by measuring the Cherenkov light they emit.
-
C.
Forward Multiplicity Detector
The Forward Multiplicity Detector is a specialized ALICE experiment subdetector at CERN designed to measure charged-particle multiplicities at very forward angles in high-energy collisions.
-
D.
Transition Radiation Detector
The Transition Radiation Detector is a particle physics instrument that identifies high-energy charged particles—especially electrons—by detecting the X-ray photons they emit when crossing boundaries between materials at relativistic speeds.
-
E.
Time Projection Chamber
The Time Projection Chamber is a large gaseous detector used in particle physics experiments to track and identify charged particles in three dimensions with high precision.
- F. None of above. chosen
Statements (30)
| Predicate | Object |
|---|---|
| instanceOf |
forward calorimeter
ⓘ
particle physics detector subsystem ⓘ |
| associatedWithExperiment | LHCf ⓘ |
| designedFor | proton–proton collisions ⓘ |
| hasComponent |
electromagnetic calorimeter section
ⓘ
hadronic calorimeter section ⓘ position-sensitive detectors ⓘ |
| hasCoordinateCoverage | pseudorapidity η > 8 ⓘ |
| hasGeometry | forward calorimeter arm ⓘ |
| hasPurpose |
provide data for tuning hadronic interaction models
ⓘ
support interpretation of ultra-high-energy cosmic-ray observations ⓘ |
| hasRole |
forward physics measurements
ⓘ
improvement of cosmic-ray air-shower models ⓘ measurement of neutral particles at very small angles ⓘ |
| hasSisterSubsystem | Arm1 detector ⓘ |
| hostOrganization | CERN ⓘ |
| installedAt |
LHC interaction point IP1
ⓘ
linked to:
LHC insertion region for CMS
|
| isForwardArmOf |
LHCf detector system
ⓘ
linked to:
LHCf
|
| locatedAtAccelerator | Large Hadron Collider ⓘ |
| locatedInFacility | CERN ⓘ |
| measures |
neutral particles
ⓘ
neutral pions ⓘ neutrons ⓘ photons ⓘ |
| operatesAt | very small polar angles relative to the beam ⓘ |
| partOf |
LHCf experiment
ⓘ
linked to:
LHCf
|
| usesTechnology |
position-sensitive layers
ⓘ
sampling calorimeter ⓘ scintillator layers ⓘ tungsten absorber plates ⓘ |
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: Arm2 detector Description of subject: The Arm2 detector is one of the forward calorimeter arms of the LHCf experiment at CERN, designed to measure neutral particles produced at very small angles in proton–proton collisions to improve models of cosmic-ray air showers.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.