Calculations of Properties of Magnetic Deflection Systems

Penner, S.S.

doi:10.1063/1.1717300

Cited by 181 publications

(21 citation statements)

References 4 publications

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“…This can be done by using the track information obtained from the detector package, 7 0000000000000000000 0000000000000000000 0000000000000000000 0000000000000000000 0000000000000000000 0000000000000000000 0000000000000000000 0000000000000000000 0000000000000000000 0000000000000000000 0000000000000000000 0000000000000000000 0000000000000000000 0000000000000000000 0000000000000000000 0000000000000000000 0000000000000000000 0000000000000000000 0000000000000000000 0000000000000000000 0000000000000000000 0000000000000000000 0000000000000000000 0000000000000000000 0000000000000000000 0000000000000000000 0000000000000000000 0000000000000000000 0000000000000000000 0000000000000000000 0000000000000000000 0000000000000000000 0000000000000000000 0000000000000000000 0000000000000000000 1111111111111111111 1111111111111111111 1111111111111111111 1111111111111111111 1111111111111111111 1111111111111111111 1111111111111111111 1111111111111111111 1111111111111111111 1111111111111111111 1111111111111111111 1111111111111111111 1111111111111111111 1111111111111111111 1111111111111111111 1111111111111111111 1111111111111111111 1111111111111111111 1111111111111111111 1111111111111111111 1111111111111111111 1111111111111111111 1111111111111111111 1111111111111111111 1111111111111111111 1111111111111111111 1111111111111111111 1111111111111111111 1111111111111111111 1111111111111111111 1111111111111111111 1111111111111111111 1111111111111111111 1111111111111111111 1111111111111111111 [2,19,20]. At the entrance to the magnet, they are at most 18 mrad (close to the acceptance boundaries in the dispersive direction).…”

Section: The Analytical Modelmentioning

confidence: 99%

Methods for optical calibration of the BigBite hadron spectrometer

Mihovilovič

Širca

Allada

et al. 2012

Nuclear Instruments and Methods in Physics Research Section A:

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The techniques for optical calibration of Jefferson Lab's large-acceptance magnetic hadron spectrometer, BigBite, have been examined. The most consistent and stable results were obtained by using a method based on singular value decomposition. In spite of the complexity of the optics, the particles' positions and momenta at the target have been precisely reconstructed from the coordinates measured in the detectors by means of a single back-tracing matrix. The technique is applicable to any similar magnetic spectrometer and any particle type. For 0.55 GeV/c protons, we have established a vertex resolution of 1.2 cm, angular resolutions of 7 mrad and 13 mrad (in-plane and out-of-plane, respectively), and a relative momentum resolution of 1.6 %.

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Section: The Analytical Modelmentioning

confidence: 99%

Methods for optical calibration of the BigBite hadron spectrometer

Mihovilovič

Širca

Allada

et al. 2012

Nuclear Instruments and Methods in Physics Research Section A:

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“…The energy resolution of this system was analyzed by using the first-order matrix theory developed by Penner (ref. 13), and others. For the aforementioned conditions, an object-image relation existed between A1 and A2 with a magnification of 1, and the energy resolution of the analyzer was about 0.2 percent.…”

Section: Methodsmentioning

confidence: 99%

Characteristics of Composite Carbon Resistors Used for Measuring Accelerator Terminal Voltages

Stevenson

Gauntner

1969

Review of Scientific Instruments

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A voltage-divider board, composed of 1152 22-MC2 composite carbon resistors used to measure the terminal voltage of a 3-MeV Dynamitron, was investigated. The board was calibrated in place by using the Be' and D photoneutron threshold reactions and a magnetic analyzer. The present calibration of the divider board, made after more than 5 years of extensive accelerator usage agreed within 2 percent with the original factory calibration. The temperature and voltage coefficients of resistance were also measured. Results showed that composite carbon resistors and the techniques de-

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“…(6.24). A scattering vertex was then computed using the three components of the neutron's momentum, the 400 coordinates for the previous vertex 9 , and the interaction depth . If the coordinates for the scattering vertex fell within the physical dimensions of the front array, an np interaction was evaluated; otherwise, GENGEN assumed the neutron did not interact in the front array, and the event was not processed in any further detail.…”

Section: Interactions In the Front And Rear Arraysmentioning

confidence: 99%

The neutron electric form factor to Q² = 1.45 (GeV/c)²

Plaster¹

2004

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The nucleon elastic electromagnetic form factors are fundamental quantities needed for an understanding of nucleon and nuclear electromagnetic structure. The evolution of the Sachs electric and magnetic form factors with Q 2 , the square of the fourmomentum transfer, is related to the distribution of charge and magnetization within the nucleon. High precision measurements of the nucleon form factors are essential for stringent tests of our current theoretical understanding of confinement within the nucleon.Measurements of the neutron form factors, in particular, those of the neutron electric form factor, have been notoriously difficult due to the lack of a free neutron target and the vanishing integral charge of the neutron. Indeed, a precise measurement of the neutron electric form factor has eluded experimentalists for decades; however, with the advent of high duty-factor polarized electron beam facilities, experiments employing polarization degrees of freedom have finally yielded the first precise measurements of this fundamental quantity.Following a general overview of the experimental and theoretical status of the nucleon form factors, a detailed description of an experiment designed to extract the neutron electric form factor from measurements of the neutron's recoil polarization in quasielastic 2 H(e, e')lH scattering is presented. The experiment described here employed the Thomas Jefferson National Accelerator Facility's longitudinally polarized electron beam, a magnetic spectrometer for detection of the scattered electron, and a neutron polarimeter designed specifically for this experiment. Measurements were conducted at three Q 2 values of 0.45, 1.13, and 1.45 (GeV/c) 2 , and the final results extracted from an analysis of the data acquired in this experiment are reported and compared with recent theoretical predictions for the nucleon form factors. Next, I would like to thank those who I credit most for my development: Jim Kelly and Andrei Semenov. At times, I found Jim's extremely high standards and desire for rigor to be exasperating, especially during the development of our simulation code and discussions of formalism (e.g., the "dreaded" Wigner rotation!), but, in retrospect, I am glad that I was constantly challenged to do something in an even better way and never permitted to give up. Indeed, I didn't fully appreciate the rigor of our analysis until our results were final, but hindsight is always 20/20. Also, I thank Jim for numerous comments and suggestions on this thesis; it is much better and much more complete because of his many suggestions. Andrei was the true guru (read: czar) of our analysis efforts, and he instilled in me the importance of careful work.I especially appreciate Andrei's timely responses to the numerous questions I always had concerning the analysis and the various analysis tools that we used; if there was someone who was sure to know the answer, that person was Andrei. Without Andrei, our analysis efforts would never have gotten off the ground. I also offer thank...

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Calculations of Properties of Magnetic Deflection Systems

Cited by 181 publications

References 4 publications

Methods for optical calibration of the BigBite hadron spectrometer

Methods for optical calibration of the BigBite hadron spectrometer

Characteristics of Composite Carbon Resistors Used for Measuring Accelerator Terminal Voltages

The neutron electric form factor to Q² = 1.45 (GeV/c)²

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