Analyses and Simulations of Longitudinal Motion in

We present an analysis of the acceleration scenario for a high-energy µ + µ - collider. Acceleration from GeV to TeV energies is required, accompanied by bunch compression to colllider-scale bunch lengths. The baseline scenario is a cascade of recirculating linacs (RLAs), with each linac increasing the beam energy by an order of magnitude. Bunch compression can occur both in the linacs themselves and in the transports connecting linacs. Constraints on acceleration design are discussed, and possible scenarios are developed. A simulation tool for RLA acceleration is presented and simulations of acceleration are described. Wakefield effects are included. Implications for µ + µ - collider scenario development are discussed, and directions for further studies are indicated. Introduction Recently, investigation of the concept of µ + µ - colliders has intensified. 1, 2, 3 In this concept a hadronic accelerator produces large numbers of ps, which produce µs from p- decay. The ..

Design Criteria For High Intensity H

INTRODUCTION All proposed pulsed spallation source projects consists of a -- linac, followed by one (or more) compressor rings or rapid cycling synchrotrons. In Fig. 1, as a typical example the layout of the ESS linac is shown [5]. The low energy part consists of two H -- ion sources with 70 mA peak current each, a 2 MeV bunched beam transfer line between two RFQs for installing a fast chopping device and a 5 MeV funneling line afterwards. The drift tube linac (DTL) operates at 350 MHz, the coupled cavity linac (CCL) at 700 MHz. The transition energy is 70 MeV. In the 1.334 GeV high energy transfer line, a 4 m long 700 MHz cavity is positioned after 75 m, acting as a bunch rotator. The linac operates at 50 Hz with 6% duty cycle. All the mentioned parameters are more or less typical for high intensity H - injector linacs. IS RFQ1 RFQ1 RFQ2 RFQ2 DTL CCL CH FU CH BR Fig. 1 ESS linac layout: IS: ion source, CH: chopper, FU: funneling, BR: bunch rotator Different fro

Cyclotron magnet calculations

Different aspects of a cyclotron magnet design, and not only calculations, are reviewed. The design is an iterative process starting from a simple model which requires a vision of the complete cyclotron and an integration of all subsystems. Finally detailed cyclotron magnet calculations are described.Anglai