Magnet

Studies of Sweeper Impact on HMS Optics

• NPS fringe field impact on HMS (4/4/2019)

NPS configurations: sweeper magnet rotation to reach smallest angles

• NPS configurations (see tables on p.12/13 and NPS layout on pp.14), Feb 2022
• NPS configurations (see tables on p.12/13 and NPS layout on pp.14), Jan 2021
• Illustrations of aperture/acceptance (see p.5/6 and tables pp.22), Feb 2019

Sweeper assembly and Preparation Plan

• Draft of the magnet preparation plan/Field mapping concept
• Sweeping magnet assembly view
• top view, dimensions as required for NPS experiments

Main Coil

• Production drawings
• Specifications
• Winding Concept

Corrector Coil

• Production Drawings
• Specifications

Yoke

• Production Drawings
• Specifications

Field calculcations

• TOSCA source file
• TOSCA field results. Grid X -1cm, Y -3cm, Z -3cm. With Z=0 at 157 cm downstream of target, X=0 at small angle side of the magnet gap as shown in figure SAM_coordinates.png

• top view of the TOSCA model (along Y)

• top view for beam line
• field on the beam line for 6.3 degree NPS position
• field in the main gap for 6.3 degree NPS position

Other Updates

• GEANT4 code for background simulations

• README instructions for using the code (Gabi)

• Sweeping magnet design for NPS experiments (updated version from 2 August 2015).

• Compared to the original version slide #14 has been corrected: The beam deflection angle is much smaller than was shown before and also added a comment about the downstream shielding of the beam line. The original version from 30 July 2015 can be found here

• Field map for the Small Angle Magnet

• The coordinate system is based on the magnet, so the target center has the coordinates x = 15 cm, y = 0 cm, z = 157 cm. The beam going to the negative z, positive x at the angle -2.2 degree. The center of the calorimeter is in the direction +4.1 degree from the target.