Silica aerogel threshold Cherenkov counters for the JLab Hall A spectrometers: improvements and proposed modifications

Lagamba, L.; Cisbani, E.; Colilli, S.; Crateri, R.; Лео, Р. Де; Frullani, S.; Garibaldi, F.; Giuliani, F.; Gricia, M.; Iodice, M.; Iommi, R.; Leone, A.; Lucentini, M.; Mostarda, A.; Nappi, E.; Perrino, R.; Pierangeli, L.; Santavenere, F.; Urciuoli, G. M.

doi:10.1016/s0168-9002(01)00808-7

Cited by 16 publications

(28 citation statements)

References 10 publications

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“…Throughout the experiment, the same equipment has been used in very similar kinematical conditions on C, Be, and H 2 O targets. The use of a pair of septum magnets permitted particle detection at very forward angles [14] and a Ring Imaging CHerenkov (RICH) detector [15,16,17] has been used in the hadron arm to provide an unambiguous identification of kaons when combined with the stardard particle identification apparatus of Hall A, based on aerogel Cherenkov detectors [18,19,20]. Details and motivations for the specific choices can be found in Ref.…”

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confidence: 99%

High-Resolution Spectroscopy ofNΛ16by Electroproduction

Cusanno¹,

Urciuoli²,

Acha³

et al. 2009

Phys. Rev. Lett.

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An experimental study of the 16 O(e, e ′ K + ) 16 Λ N reaction has been performed at Jefferson Lab. A thin film of falling water was used as a target. This permitted a simultaneous measurement of the p(e, e ′ K + )Λ,Σ 0 exclusive reactions and a precise calibration of the energy scale. A groundstate binding energy of 13.76 ± 0.16 MeV was obtained for 16 Λ N with better precision than previous measurements on the mirror hypernucleus 16 Λ O. Precise energies have been determined for peaks arising from a Λ in s and p orbits coupled to the p 1/2 and p 3/2 hole states of the 15 N core nucleus.

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confidence: 99%

High-Resolution Spectroscopy ofNΛ16by Electroproduction

Cusanno¹,

Urciuoli²,

Acha³

et al. 2009

Phys. Rev. Lett.

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“…Throughout the experiment, the same equipment has been used in very similar kinematical conditions on C, Be, and H 2 O targets. The use of a pair of septum magnets permitted particle detection at very forward angles [21] and a Ring Imaging CHerenkov (RICH) detector [22][23][24][25] has been used in the hadron arm to provide an unambiguous identification of kaons when combined with the standard particle identification apparatus of Hall A, based on aerogel Cherenkov detectors [26][27][28]. In the present experiment a 92.5 mg/cm 2 solid 9 Be target with a beam current of ∼100 µA was used at a beam energy of 3775 MeV.…”

Section: Methodsmentioning

confidence: 99%

Spectroscopy ofLiΛ9by electroproduction

Urciuoli¹,

Cusanno²,

Marrone³

et al. 2015

Phys. Rev. C

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Background: In the absence of accurate data on the free two-body hyperon-nucleon interaction, the spectra of hypernuclei provides information on the details of the effective hyperon-nucleon interaction.Purpose: To obtain a high-resolution binding energy spectrum for the 9 Be(e, e ′ K + ) 9 Λ Li reaction. Method: Electroproduction of the hypernucleus 9 Λ Li has been studied for the first time with sub-MeV energy resolution in Hall A at Jefferson Lab on a 9 Be target. In order to increase the counting rate and to provide unambiguous kaon identification, two superconducting septum magnets and a Ring Imaging CHerenkov detector (RICH) were added to the Hall A standard equipment. Results: The cross section to low-lying states of 9 Λ Li is concentrated within 3 MeV of the ground state and can be fitted with four peaks. The positions of the doublets agree with theory while a disagreement could exist with respect to the relative strengths of the peaks in the doublets. The Λ separation energy, BΛ, of 8.36 ± 0.08 (stat.) ± 0.08 (syst.) MeV was measured, in agreement with an earlier experiment.

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“…The PID system in the hadron arm is composed of: a high-resolution scintillator plane, two aerogel threshold Cherenkov counters A1 and A2 [3,4] (n 1 = 1.015, n 2 = 1.055) which were included in the trigger, and the RICH detector for offline analysis.…”

Section: Particle Identificationmentioning

confidence: 99%

Hypernuclear spectroscopy in JLab’s Hall A

LeRose

Acha

Bydžovský

et al. 2007

Proceedings of the IX International Conference on Hypernuclear and Strange Particle Physics

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Results are presented from a new experiment (E94-107) in Hall A of the Thomas Jefferson National Accelerator Facility (JLab) producing 12 Λ B using electroproduction, (e,e'K +). In the hypernuclear missing-mass spectrum the experiment achieves very good energy resolution (640 keV FWHM) by exploiting the characteristics of the High Resolution spectrometer pair and the exceptional beam quality available at JLab. The spectrometers were used with the addition an INFN provided pair of septum magnets to reach the desired small angles. Also, the Hall A standard complement of equipment was further augmented by the addition of a Ring Imaging Cherenkov detector (RICH) to achieve the best possible kaon identification.

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Silica aerogel threshold Cherenkov counters for the JLab Hall A spectrometers: improvements and proposed modifications

Cited by 16 publications

References 10 publications

High-Resolution Spectroscopy ofNΛ16by Electroproduction

High-Resolution Spectroscopy ofNΛ16by Electroproduction

Spectroscopy ofLiΛ9by electroproduction

Hypernuclear spectroscopy in JLab’s Hall A

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