Extra Low ENergy Antiproton ring
E213261
The Extra Low ENergy Antiproton (ELENA) ring is a deceleration and storage facility at CERN designed to slow antiprotons to very low energies for precision antimatter experiments.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Extra Low ENergy Antiproton ring canonical | 3 |
How this entity was disambiguated
This entity first appeared as the object of triple T1889563 — 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: Extra Low ENergy Antiproton ring Context triple: [ELENA ring, acronymFor, Extra Low ENergy Antiproton ring]
-
A.
Antiproton Decelerator
The Antiproton Decelerator is a specialized CERN facility that slows down antiprotons to low energies for precision experiments in antimatter physics.
-
B.
Large Electron–Positron Collider
The Large Electron–Positron Collider was a major circular particle accelerator at CERN that collided electrons and positrons to probe the electroweak interaction and test the Standard Model of particle physics.
-
C.
Proton Synchrotron Booster
The Proton Synchrotron Booster is a circular particle accelerator at CERN that increases the energy of protons from the linear accelerator before injecting them into larger synchrotrons in the accelerator complex.
-
D.
Continuous Electron Beam Accelerator Facility
The Continuous Electron Beam Accelerator Facility is a high-energy physics research installation that provides continuous beams of electrons for probing the structure of nuclear matter.
-
E.
Proton Synchrotron
The Proton Synchrotron is a historic circular particle accelerator at CERN that has played a key role in high-energy physics research and in feeding beams to larger colliders.
- 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: Extra Low ENergy Antiproton ring Target entity description: The Extra Low ENergy Antiproton (ELENA) ring is a deceleration and storage facility at CERN designed to slow antiprotons to very low energies for precision antimatter experiments.
-
A.
Antiproton Decelerator
The Antiproton Decelerator is a specialized CERN facility that slows down antiprotons to low energies for precision experiments in antimatter physics.
-
B.
Large Electron–Positron Collider
The Large Electron–Positron Collider was a major circular particle accelerator at CERN that collided electrons and positrons to probe the electroweak interaction and test the Standard Model of particle physics.
-
C.
Proton Synchrotron Booster
The Proton Synchrotron Booster is a circular particle accelerator at CERN that increases the energy of protons from the linear accelerator before injecting them into larger synchrotrons in the accelerator complex.
-
D.
Continuous Electron Beam Accelerator Facility
The Continuous Electron Beam Accelerator Facility is a high-energy physics research installation that provides continuous beams of electrons for probing the structure of nuclear matter.
-
E.
Proton Synchrotron
The Proton Synchrotron is a historic circular particle accelerator at CERN that has played a key role in high-energy physics research and in feeding beams to larger colliders.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
CERN facility
ⓘ
antiproton decelerator ⓘ decelerator ring ⓘ storage ring ⓘ |
| abbreviation | ELENA ⓘ |
| adjacentFacility | Antiproton Decelerator ⓘ |
| beamEnergyRange | from 5.3 MeV to 100 keV ⓘ |
| beamParticle | antiproton ⓘ |
| circumference | about 30.4 m ⓘ |
| constructionStart | 2011 ⓘ |
| country | Switzerland ⓘ |
| enables |
gravity measurements with antihydrogen
ⓘ
precision spectroscopy of antihydrogen ⓘ tests of CPT symmetry with antimatter ⓘ |
| energyReductionFactor | about 50 ⓘ |
| extractionEnergy | 100 keV ⓘ |
| feedsFrom | Antiproton Decelerator ⓘ |
| firstBeamCirculation | 2016 ⓘ |
| funding | CERN member states ⓘ |
| hasComponent |
bending magnets
ⓘ
electron cooler ⓘ electrostatic transfer lines ⓘ quadrupole magnets ⓘ radio-frequency system ⓘ |
| improves | antiproton trapping efficiency ⓘ |
| injectionEnergy | 5.3 MeV ⓘ |
| locatedIn |
CERN
ⓘ
Meyrin ⓘ
surface form:
Meyrin, Switzerland
|
| operator | CERN ⓘ |
| partOf | CERN accelerator complex ⓘ |
| purpose |
decelerate antiprotons to very low energies
ⓘ
enable precision measurements with antimatter ⓘ improve efficiency of antiproton use ⓘ provide low-energy antiprotons for antimatter experiments ⓘ |
| reduces | antiproton beam emittance ⓘ |
| scientificField |
antimatter research
ⓘ
particle physics ⓘ |
| servesExperiment |
AEgIS
ⓘ
ALPHA ⓘ ATRAP ⓘ BASE ⓘ GBAR ⓘ PUMA ⓘ other low-energy antimatter experiments ⓘ |
| shape | hexagonal ring ⓘ |
| startOfOperation | around 2017 ⓘ |
| status | operational ⓘ |
| technology |
electron cooling
ⓘ
electrostatic beam transport ⓘ |
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: Extra Low ENergy Antiproton ring Description of subject: The Extra Low ENergy Antiproton (ELENA) ring is a deceleration and storage facility at CERN designed to slow antiprotons to very low energies for precision antimatter experiments.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.