1.6 GeV/c charged particle spectrometer facility at the Stanford Linear Accelerator Center
TL;DR: A 1.6 GeV/c spectrometer was constructed at SLAC incorporating an n = 0, 90° bend, 254 cm radius magnet with second-order corrections as mentioned in this paper.
About: This article is published in Nuclear Instruments and Methods.The article was published on 1968-12-15 and is currently open access. It has received 4 citations till now. The article focuses on the topics: Spectrometer & Particle accelerator.
Summary (1 min read)
Jump to: and [Summary]
Summary
- The magnet is of the window frame type allowing invariant focal properties up to 2lkg.
- It simultaneously focusses production angle and momentum from a 20cm long target onto a single focal plane orthogonal to the beam direction allowing a considerable simplification in detecting a high energy scattering process.
- The SLAC 1.6 GeV/c spectrometer is mounted on a common pivot with two other SLAC spectrometers, the 8 and 20 GeV/c spectrometers.
- Angled entrance and exit faces introduce first-order focussing conditions which make the production angle and momentum focal planes coincident in space.
- This feature simplifies the detector arrays required for the analysis of high energy physics experiments.
- The production angle versus momentum display in the focal plane has a linear dispersion of 4>19cm per percent in momentum and 0.808cm per milliradian in angle, with a resolution of 2 0.0896 in momentum and 2 0.4 milliradian in angle.
- This degree of resolution is required to kinematically separate processes differing by the production of only one a-meson.
- This display is convenient since the kinematics of e-body processes give an approximately linear relation between production angle and momentum over the small region seen by the spectrometer at any one setting.
- The focus of particles from a particular two body process is approximately a straight line in the foea,1 plane, and can be selectively detected by appropriate scintillation counters.
- In practice, the focal plane is divided into strips by the hodoscope counters which can be rotated into alignment along the appropriate kinematic curve.
- This technique thus eliminates the complex decoding necessary for SySteRS which use separate hodoscopes for both angle and momentum measurements, and makes it possible to count particles at 100 megacycle rates with relatively simple.
Did you find this useful? Give us your feedback
Citations
More filters
TL;DR: Inelastic electron scattering cross sections have been measured for four-momentum transfers between 4.1 and 30.5 GeV 2 as discussed by the authors, where the dominant contribution to the cross section comes from the W 1 structure function.
41 citations
TL;DR: Experimental and elementary theoretical work relevant to the electromagnetic and hadron excitation of the Δ isobar in nuclei is reviewed in this article, where the historical development of the notion of non-nucleon degrees of freedom, from the quasinucleon and the pion to quarks and gluons, is described.
Abstract: Experimental and elementary theoretical work relevant to the electromagnetic and hadron excitation of the Δ isobar in nuclei is reviewed. The historical development of the notion of non-nucleon degrees of freedom, from the quasinucleon and the pion to quarks and gluons, is described, and the role of Δ excitations is discussed. Gamma, electron, proton, pion, and ion beam methodologies and detector and target designs are discussed. Preliminary suggestions about γ, e, p, π excitation mechanisms are made. Problem areas that need more research are highlighted, and trends for the future and prospective experiments are discussed.
15 citations
8 citations
TL;DR: In this article, the transition between hadronic and quark degrees of freedom is discussed, particularly in low energy deuteron photodisintegration, including new unpublished results.
1 citations
References
More filters
TL;DR: In this article, a 90° bend n=0 magnetic spectrometer has been constructed which uses curved field boundaries to achieve second order correction of the focal properties and to make the image plane normal to the emerging particles.
Abstract: A 90° bend n=0 magnetic spectrometer has been constructed which uses curved field boundaries to achieve second order correction of the focal properties and to make the image plane normal to the emerging particles. The spectrometer has a 112 cm radius of curvature and a maximum momentum capability of 725 MeV/c. The window frame yoke, with sloping edge profiles to minimize edge saturation, enables the focal properties to remain invariant up to 21 kG. The solid angle acceptance is 8×10−3 sr with 0.1% resolution and the maximum momentum acceptance is ±5%.
4 citations