Crystal Ball (detector): Difference between revisions

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The Crystal Ball was a hermetic particle detector used initially with the SPEAR particle accelerator at the Stanford Linear Accelerator Center beginning in 1979. It was designed to detect neutral particles and was used to discover the ηc meson. Its central section was a spark chamber surrounded by a nearly-complete sphere of scintillating crystals (NaI(Tl)), for which it was named. With the addition of endcaps of similar construction, the detector covered 98% of the solid angle around the interaction point.

After its decommissioning at SLAC, the detector was carried to DESY, where it was used for b-physics experiments.

In 1996, it was moved to the Alternating Gradient Synchrotron (AGS) at Brookhaven National Laboratory, where it was used in a series of pion- and kaon-induced experiments on the proton. Currently it is located at Mainz Microtron facility, where it is being used by the A2 Collaboration for a diverse program of measurements using energy tagged Bremsstrahlung photons.

References

Partridge, R.; et al. (1980). "Decay J/ψ→3γ and a search for the ηc". Physical Review Letters. 44 (11): 712–716. Bibcode:1980PhRvL..44..712P. doi:10.1103/PhysRevLett.44.712. (detector description)
Partridge, R.; et al. (1980). "Observation of an ηc Candidate State with Mass 2978 ± 9 MeV". Physical Review Letters. 45 (14): 1150–1153. Bibcode:1980PhRvL..45.1150P. doi:10.1103/PhysRevLett.45.1150. (η_c discovery)
A2 Collaboration website

External links

Crystal Ball experiment record on INSPIRE-HEP

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-The '''Crystal Ball''' is a [[hermetic detector|hermetic]] [[particle detector]] used initially with the [[SPEAR]] [[particle accelerator]] at the [[Stanford Linear Accelerator Center]] beginning in 1979.  It was designed to detect [[neutral particle]]s and was used to discover the [[charmonium|η<small>c</small> meson]].  Its central section was a [[spark chamber]] surrounded by a nearly-complete sphere of [[scintillator|scintillating]] [[crystal]]s ([[sodium iodide#Scintillator|NaI(Tl)]]), for which it was named. With the addition of endcaps of similar construction, the detector covered 98% of the [[solid angle]] around the [[interaction point]].
+The '''Crystal Ball''' was a [[hermetic detector|hermetic]] [[particle detector]] used initially with the [[SPEAR]] [[particle accelerator]] at the [[Stanford Linear Accelerator Center]] beginning in 1979.  It was designed to detect [[neutral particle]]s and was used to discover the [[charmonium|η<small>c</small> meson]].  Its central section was a [[spark chamber]] surrounded by a nearly-complete sphere of [[scintillator|scintillating]] [[crystal]]s ([[sodium iodide#Scintillator|NaI(Tl)]]), for which it was named. With the addition of endcaps of similar construction, the detector covered 98% of the [[solid angle]] around the [[interaction point]].
-After its decommissioning at SLAC, the detector was carried to [[DESY]], where it was used for b-physics experiments. Currently it is located at [[Mainz Microtron]] facility, where it is being used by the [[A2 Collaboration]] for a diverse program of measurements using energy tagged [[Bremsstrahlung]] photons.
+After its decommissioning at SLAC, the detector was carried to [[DESY]], where it was used for b-physics experiments.
+In 1996, it was moved to the Alternating Gradient Synchrotron (AGS) at [[Brookhaven National Laboratory]], where it was used in a series of pion- and kaon-induced experiments on the proton.  Currently it is located at [[Mainz Microtron]] facility, where it is being used by the [[A2 Collaboration]] for a diverse program of measurements using energy tagged [[Bremsstrahlung]] photons.
 == References ==
-# {{cite journal | author= Partridge, R., et al. | title=Decay J/ψ→3γ and a search for the η<small>c</small> | year=1980 | bibcode=1980PhRvL..44..712P | journal=[[Physical Review Letters]] | volume=44 | issue=11 | pages=712–716 | doi= 10.1103/PhysRevLett.44.712}} (detector description)
+# {{cite journal | author= Partridge, R. | title=Decay J/ψ→3γ and a search for the η<small>c</small> | year=1980 | bibcode=1980PhRvL..44..712P | journal=[[Physical Review Letters]] | volume=44 | issue=11 | pages=712–716 | doi= 10.1103/PhysRevLett.44.712|display-authors=etal}} (detector description)
-# {{cite journal | author= Partridge, R., et al. | title=Observation of an η<small>c</small> Candidate State with Mass 2978 ± 9 MeV | year=1980 | bibcode=1980PhRvL..45.1150P | journal=[[Physical Review Letters]] | volume=45 | issue=14 | pages=1150–1153 | doi= 10.1103/PhysRevLett.45.1150}} (η<sub>c</sub> discovery)
+# {{cite journal | author= Partridge, R. | title=Observation of an η<small>c</small> Candidate State with Mass 2978 ± 9 MeV | year=1980 | bibcode=1980PhRvL..45.1150P | journal=[[Physical Review Letters]] | volume=45 | issue=14 | pages=1150–1153 | doi= 10.1103/PhysRevLett.45.1150|display-authors=etal}} (η<sub>c</sub> discovery)
-# [http://wwwa2.kph.uni-mainz.de/A2/ A2 Collaboration website]
+# [http://wwwa2.kph.uni-mainz.de/ A2 Collaboration website]
+== External links ==
+* [https://inspirehep.net/experiments/1109531 Crystal Ball] experiment record on [[INSPIRE-HEP]]
 [[Category:Particle experiments]]