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3 results on '"Hempstead, J. B."'

1. The laser-based gain monitoring system of the calorimeters in the Muon $g-2$ experiment at Fermilab

Author

Anastasi, A., Basti, A., Bedeschi, F., Boiano, A., Bottalico, E., Cantatore, G., Cauz, D., Chapelain, A. T., Corradi, G., Dabagov, S., Di Falco, S., Di Meo, P., Di Sciascio, G., Di Stefano, R., Donati, S., Driutti, A., Ferrari, C., Fienberg, A. T., Fioretti, A., Gabbanini, C., Gibbons, L. K., Gioiosa, A., Girotti, P., Hampai, D., Hempstead, J. B., Hertzog, D. W., Iacovacci, M., Incagli, M., Karuza, M., Kaspar, J., Khaw, K. S., Lusiani, A., Marignetti, F., Mastroianni, S., Miozzi, S., Nath, A., Pauletta, G., Piacentino, G. M., Raha, N., Santi, L., Smith, M., Sorbara, M., Sweigart, D. A., and Venanzoni, G.

Subjects
Physics - Instrumentation and Detectors, High Energy Physics - Experiment
Abstract

The Muon $g-2$ experiment, E989, is currently taking data at Fermilab with the aim of reducing the experimental error on the muon anomaly by a factor of four and possibly clarifying the current discrepancy with the theoretical prediction. A central component of this four-fold improvement in precision is the laser calibration system of the calorimeters, which has to monitor the gain variations of the photo-sensors with a 0.04\% precision on the short-term ($\sim 1\,$ms). This is about one order of magnitude better than what has ever been achieved for the calibration of a particle physics calorimeter. The system is designed to monitor also long-term gain variations, mostly due to temperature effects, with a precision below the per mille level. This article reviews the design, the implementation and the performance of the Muon $g-2$ laser calibration system, showing how the experimental requirements have been met., Comment: 33 pages,24 figures. Matches the published version

Published
2019
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2. Performance of the Muon $g-2$ calorimeter and readout systems measured with test beam data

Author

Khaw, K. S., Bartolini, M., Binney, H., Bjorkquist, R., Chapelain, A., Driutti, A., Ferrari, C., Fienberg, A. T., Fioretti, A., Gabbanini, C., Ganguly, S., Gibbons, L. K., Gioiosa, A., Giovanetti, K., Gohn, W. P., Gorringe, T. P., Hempstead, J. B., Hertzog, D. W., Iacovacci, M., Kaspar, J., Kuchibhotla, A., Leo, S., Lusiani, A., Mastroianni, S., Pauletta, G., Peterson, D. A., Pocanic, D., Rider, N., Schlesier, C. D., Smith, M. W., Stuttard, T., Sweigart, D. A., Van Wechel, T. D., and Venanzoni, G.

Subjects
Physics - Instrumentation and Detectors, High Energy Physics - Experiment
Abstract

A single calorimeter station for the Muon $g-2$ experiment at Fermilab includes the following subsystems: a 54-element array of PbF$_{2}$ Cherenkov crystals read out by large-area SiPMs, bias and slow-control electronics, a suite of 800 MSPS waveform digitizers, a clock and control distribution network, a gain calibration and monitoring system, and a GPU-based frontend read out through a MIDAS data acquisition environment. The entire system performance was evaluated using 2.5 - 5 GeV electrons at the End Station Test Beam at SLAC. This paper includes a description of the individual subsystems and the results of measurements of the energy response and resolution, energy-scale stability, timing resolution, and spatial uniformity. All measured performances meet or exceed the $g-2$ experimental requirements. Based on the success of the tests, the complete production of the required 24 calorimeter stations has been made and installation into the main experiment is complete. Furthermore, the calorimeter response measurements determined here informed the design of the reconstruction algorithms that are now employed in the running $g-2$ experiment., Comment: 16 pages, 27 figures. Updated to match published version

Published
2019
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3. The laser-based gain monitoring system of the calorimeters in the Muon g −2 experiment at Fermilab

Author

S.B. Dabagov, A. Chapelain, S. Di Falco, G. Di Sciascio, M. Incagli, A. Boiano, A. Lusiani, D. Cauz, Dariush Hampai, L. K. Gibbons, J.B. Hempstead, G. M. Piacentino, A. Fioretti, A. Anastasi, E. Bottalico, N. Raha, D. W. Hertzog, G. Venanzoni, A.T. Fienberg, R. Di Stefano, Fabrizio Marignetti, C. Gabbanini, Claudio Ferrari, A. Nath, F. Bedeschi, G. Pauletta, K. S. Khaw, S. Mastroianni, G. Corradi, M. Iacovacci, M. W. Smith, Marin Karuza, A. Gioiosa, S. Donati, S. Miozzi, A. Basti, A. Driutti, M. Sorbara, P. Girotti, D.A. Sweigart, Giovanni Cantatore, P. Di Meo, L. Santi, J. Kaspar, Anastasi, A., Basti, A., Bedeschi, F., Boiano, A., Bottalico, E., Cantatore, G., Cauz, D., Chapelain, A. T., Corradi, G., Dabagov, S., Falco, S. D., Meo, P. D., Sciascio, G. D., Stefano, R. D., Donati, S., Driutti, A., Ferrari, C., Fienberg, A. T., Fioretti, A., Gabbanini, C., Gibbons, L. K., Gioiosa, A., Girotti, P., Hampai, D., Hempstead, J. B., Hertzog, D. W., Iacovacci, M., Incagli, M., Karuza, M., Kaspar, J., Khaw, K. S., Lusiani, A., Marignetti, F., Mastroianni, S., Miozzi, S., Nath, A., Pauletta, G., Piacentino, G. M., Raha, N., Santi, L., Smith, M., Sorbara, M., Sweigart, D. A., Venanzoni, G., Falco, S. Di, Meo, P. Di, Sciascio, G. Di, and Stefano, R. Di

Subjects
sources, Physics - Instrumentation and Detectors, Physics::Instrumentation and Detectors, Detector alignment and calibration methods (lasers, sources, particle-beams), FOS: Physical sciences, 01 natural sciences, 030218 nuclear medicine & medical imaging, law.invention, High Energy Physics - Experiment, Nuclear physics, 03 medical and health sciences, Calorimeters, High Energy Physics - Experiment (hep-ex), 0302 clinical medicine, law, 0103 physical sciences, Calibration, Fermilab, Instrumentation, Mathematical Physics, Physics, Calorimeter, Muon, 010308 nuclear & particles physics, Anomaly (natural sciences), Monitoring system, particle-beams), Instrumentation and Detectors (physics.ins-det), Laser, muon g-2, 3. Good health, Detector alignment and calibration methods (lasers, High Energy Physics::Experiment, Order of magnitude
Abstract

The Muon $g-2$ experiment, E989, is currently taking data at Fermilab with the aim of reducing the experimental error on the muon anomaly by a factor of four and possibly clarifying the current discrepancy with the theoretical prediction. A central component of this four-fold improvement in precision is the laser calibration system of the calorimeters, which has to monitor the gain variations of the photo-sensors with a 0.04\% precision on the short-term ($\sim 1\,$ms). This is about one order of magnitude better than what has ever been achieved for the calibration of a particle physics calorimeter. The system is designed to monitor also long-term gain variations, mostly due to temperature effects, with a precision below the per mille level. This article reviews the design, the implementation and the performance of the Muon $g-2$ laser calibration system, showing how the experimental requirements have been met., 33 pages,24 figures. Matches the published version

Full Text
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