Commissioning and Testing the 1970's Era LASS Solenoid Magnet in JLab's Hall D

Ballard, Joshua; Biallas, G.; Brown, G.; Butler, David A.; Carstens, T.; Chudakov, E.; Creel, J.; Egiyan, H.; Ghoshal, Probir K.; Martin, Floyd; Qiang, Y.; Smith, E. S.; Stevens, Mark; Spiegel, S.; Whitlatch, T.; Wolin, E.

doi:10.1109/tasc.2014.2385152

Cited by 4 publications

(8 citation statements)

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“…The solenoid employs a cryostatically stable design with cryostats designed to be opened and serviced with hand tools. The magnet was refurbished and modified 27 for the GlueX experiment [35,36].…”

Section: Overviewmentioning

confidence: 99%

“…The major components of the system are a pulse tube cryocooler, 35 a condenser, and a target cell. These items are contained within an aluminum and stainless steel 'L'-shaped vacuum chamber with an extension of closed-cell foam 36 surrounding the target cell. In turn, the GlueX Start Counter (Sec.…”

Section: Targetmentioning

confidence: 99%

“…Hydrogen gas is stored inside two 200 l tanks and is cooled and condensed into a small copper and stainless steel container, the condenser, that is thermally anchored to the second cooling stage 35 Cryomech model PT415. 36 Rohacell 110XT, Evonik Industries AG. of the cryocooler.…”

Section: Targetmentioning

confidence: 99%

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The GlueX beamline and detector

Adhikari

Akondi

Ghoul

et al. 2021

Nuclear Instruments and Methods in Physics Research Section A:

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The GlueX experiment at Je↵erson Lab has been designed to study photoproduction reactions with a 9-GeV linearly polarized photon beam. The energy and arrival time of beam photons are tagged using a scintillator hodoscope and a scintillating fiber array. The photon flux is determined using a pair spectrometer, while the linear polarization of the photon beam is determined using a polarimeter based on triplet photoproduction. Charged-particle tracks from interactions in the central target are analyzed in a solenoidal field using a central straw-tube drift chamber and six packages of planar chambers with cathode strips and drift wires. Electromagnetic showers are reconstructed in a cylindrical scintillating fiber calorimeter inside the magnet and a lead-glass array downstream. Charged particle identification is achieved by measuring energy loss in the wire chambers and using the flight time of particles between the target and detectors outside the magnet. The signals from all detectors are recorded with flash ADCs and/or pipeline TDCs into memories allowing trigger decisions with a latency of 3.3 µs. The detector operates routinely at trigger rates of 40 kHz and data rates of 600 megabytes per second. We describe the photon beam, the GlueX detector components, electronics, data-acquisition and monitoring systems, and the performance of the experiment during the first three years of operation.

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Section: Overviewmentioning

confidence: 99%

Section: Targetmentioning

confidence: 99%

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The GlueX beamline and detector

Adhikari

Akondi

Ghoul

et al. 2021

Nuclear Instruments and Methods in Physics Research Section A:

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“…A subsequent ramp caused the magnet to quench at 1460 A. The magnet was then run multiple times to 1350 A without mishap [12]. A detailed investigation was conducted as to the cause of the quench but a root cause could not be determined.…”

Section: Technical Challenges and Risk Mitigationsmentioning

confidence: 99%

Superconducting Magnets for the 12 GeV Upgrade at Jefferson Laboratory

Fair

Young

2015

IEEE Trans. Appl. Supercond.

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Jefferson Laboratory is embarked on an energy upgrade to its flagship continuous electron beam accelerator in order to expand the scope of its research capabilities and probe further into the structure of nuclear particles. The 12 GeV upgrade includes the design, manufacture, integration, installation and commissioning of eight different superconducting magnets in three separate experimental halls. The effort involves other national laboratories, universities and industry spanning three countries. This paper will summarize the key characteristics of these magnets, ranging in size from 0.2 to 23 MJ in stored energy, and featuring many different types and configurations. The paper will also give an overview of the specific technical challenges for each magnet, and a status report on magnet manufacture and expected delivery dates. The 12GeV upgrade at J-Lab represents the largest superconducting magnet fabrication and installation program currently ongoing in the United States and this paper will present the breadth of collaborations supporting it.  Index Terms-12 GeV upgrade, continuous electron beam accelerator, superconducting magnets, Jefferson Lab Manuscript received August 08, 2014.

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“…includes a hardwired interlock safety system that will protect both magnet systems in the event of various fault scenarios. A reliable, tried [4] and tested quench detection and protection circuit is also part of the MDS.…”

Section: Introductionmentioning

confidence: 99%

FMEA on the Superconducting Torus for the Jefferson Lab 12 GeV Accelerator Upgrade

Ghoshal

Biallas

Fair

et al. 2015

IEEE Trans. Appl. Supercond.

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As part of the Jefferson Lab 12 GeV accelerator upgrade project, Hall B requires two conduction cooled superconducting magnets. One is a magnet system consisting of six superconducting trapezoidal racetrack-type coils assembled in a toroidal configuration and the second is an actively shielded solenoidal magnet system consisting of five coils. Both magnets are to be wound with Superconducting Super Collider-36 NbTi strand Rutherford cable soldered into a copper channel. This paper describes This paper describes a failure modes and effects analysis (FMEA) that was done on these magnets to identify their various failure modes, which were assessed in terms of their Risk Priority Numbers (RPN). Mitigating actions were identified that would reduce the RPNs to acceptable values.Index Terms-Conduction cooled, failure modes and effects analysis (FMEA), magnet quench protection, SSC-NbTi rutherford cable, superconducting magnet, torus.

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Commissioning and Testing the 1970's Era LASS Solenoid Magnet in JLab's Hall D

Cited by 4 publications

References 4 publications

The GlueX beamline and detector

The GlueX beamline and detector

Superconducting Magnets for the 12 GeV Upgrade at Jefferson Laboratory

FMEA on the Superconducting Torus for the Jefferson Lab 12 GeV Accelerator Upgrade

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