| Paper | Title | Page |
|---|---|---|
| MODP17 |
Magnetic System For Residual Gas Monitor
NPI at MSU, Moscow, Russia
The advanced residual gas monitor requires very careful design of each structural component and special attention to match the properties of different subsystems. An important point is a proper magnetic guiding system design. As it is shown, high field uniformity, which is required for sub-mm spatial resolution, can be achieved despite the presence of the field-distorting hole for the light signal transmitting. The low energy (down to 10 MeV/u) beam disturbance compensation methods are also discussed. The ionization process and electron dynamics simulations are used for proving this system design. |
241 |
| MOHP12 |
Permanent Magnet Quadrupole For The 1-St Tank of LINAC-4
Rare-earth 60 mm diameter, 45 mm long quadrupole for the LINAC-4 focusing channel on the integrated gradient of 2.3 T is described. The thin side washers are used for tuning the quad into specified gradient integral with 0.5 % accuracy. The single washer contribution calculations are discussed. A method of the magnetic axis offset in the REPM quad decreasing down to 30 mm is discussed to exclude its compensation by the outer diameter machining before inserting into the drift tube. Nonlinearity of the field is less than 1 % in the reference range of 75% of beam aperture at the central cross-section near the quad axis. The angular quadrupole arrangement in the drift tube will be provided by machining the main groove on the quad surface in the median plane with 1 mrad accuracy. Calculations of the longitudinal gradient distribution between two closer quadrupoles showed that some percents should be added to the nominal gradient in the beginning of the LINAC-4 focusing channel because of partial field compensation. |
298 |