FEL-2
E717905
FEL-2 is a high-gain, seeded free-electron laser beamline at the FERMI facility, designed to produce intense, coherent extreme-ultraviolet and soft X-ray radiation for advanced scientific experiments.
All labels observed (1)
| Label | Occurrences |
|---|---|
| FEL-2 canonical | 2 |
How this entity was disambiguated
This entity first appeared as the object of triple T8177749 — 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: FEL-2 Context triple: [FERMI free-electron laser, hasBeamline, FEL-2]
-
A.
FEL-1
FEL-1 is one of the primary beamlines of the FERMI free-electron laser facility, delivering coherent extreme-ultraviolet and soft X-ray radiation for advanced scientific experiments.
-
B.
Gepard self-propelled anti-aircraft gun
The Gepard self-propelled anti-aircraft gun is a German-made, radar-guided, armored air-defense vehicle equipped with twin 35 mm cannons designed to protect ground forces from low-flying aircraft and helicopters.
-
C.
SU-85 self-propelled gun
The SU-85 self-propelled gun was a Soviet World War II tank destroyer armed with an 85 mm gun and built on the chassis of the T-34 medium tank.
-
D.
Katyusha rocket launcher
The Katyusha rocket launcher was a Soviet World War II-era multiple rocket artillery system famed for its devastating salvos and distinctive howling sound.
-
E.
S-25 Berkut
The S-25 Berkut was an early Soviet fixed surface-to-air missile system developed in the 1950s to provide high-altitude air defense for Moscow during the Cold War.
- 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: FEL-2 Target entity description: FEL-2 is a high-gain, seeded free-electron laser beamline at the FERMI facility, designed to produce intense, coherent extreme-ultraviolet and soft X-ray radiation for advanced scientific experiments.
-
A.
FEL-1
FEL-1 is one of the primary beamlines of the FERMI free-electron laser facility, delivering coherent extreme-ultraviolet and soft X-ray radiation for advanced scientific experiments.
-
B.
Gepard self-propelled anti-aircraft gun
The Gepard self-propelled anti-aircraft gun is a German-made, radar-guided, armored air-defense vehicle equipped with twin 35 mm cannons designed to protect ground forces from low-flying aircraft and helicopters.
-
C.
SU-85 self-propelled gun
The SU-85 self-propelled gun was a Soviet World War II tank destroyer armed with an 85 mm gun and built on the chassis of the T-34 medium tank.
-
D.
Katyusha rocket launcher
The Katyusha rocket launcher was a Soviet World War II-era multiple rocket artillery system famed for its devastating salvos and distinctive howling sound.
-
E.
S-25 Berkut
The S-25 Berkut was an early Soviet fixed surface-to-air missile system developed in the 1950s to provide high-altitude air defense for Moscow during the Cold War.
- F. None of above. chosen
Statements (43)
| Predicate | Object |
|---|---|
| instanceOf |
scientific instrument
ⓘ
seeded free-electron laser ⓘ |
| endPoint | experimental endstations ⓘ |
| energyRange | extreme-ultraviolet to soft X-ray ⓘ |
| hasBeamlineType |
high-gain harmonic generation
ⓘ
seeded harmonic generation ⓘ |
| hasComponent |
experimental stations
ⓘ
modulator undulator ⓘ photon transport system ⓘ radiator undulators ⓘ |
| hasProperty |
high spatial coherence
ⓘ
high temporal coherence ⓘ high-gain ⓘ seeded ⓘ short pulse duration ⓘ tunable wavelength ⓘ |
| hasRelation | complementary to FEL-1 at FERMI ⓘ |
| hasUserCommunity | international scientific users ⓘ |
| locatedIn |
Elettra Sincrotrone Trieste
ⓘ
FERMI free-electron laser facility ⓘ
linked to:
FERMI free-electron laser
Italy ⓘ Trieste ⓘ
linked to:
Trieste, Italy
|
| operatedBy | Elettra Sincrotrone Trieste ⓘ |
| partOf |
FERMI facility
ⓘ
FERMI@Elettra ⓘ
linked to:
FERMI free-electron laser
|
| produces |
coherent radiation
ⓘ
extreme-ultraviolet radiation ⓘ intense photon pulses ⓘ soft X-ray radiation ⓘ |
| startPoint | FERMI linac ⓘ |
| supportsDiscipline |
atomic and molecular physics
ⓘ
chemical dynamics ⓘ condensed matter physics ⓘ materials science ⓘ nanoscience ⓘ |
| usedFor |
coherent diffraction imaging
ⓘ
nonlinear XUV and soft X-ray experiments ⓘ pump–probe experiments ⓘ time-resolved spectroscopy ⓘ ultrafast dynamics studies ⓘ |
| uses |
electron beam
ⓘ
seed laser ⓘ undulator line ⓘ |
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: FEL-2 Description of subject: FEL-2 is a high-gain, seeded free-electron laser beamline at the FERMI facility, designed to produce intense, coherent extreme-ultraviolet and soft X-ray radiation for advanced scientific experiments.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.