|
|
|
Functional Principle
The cw electron accelerator MAMI consists of three cascaded racetrack microtrons
with a 3.5MeV injector linac, followed by a Harmonic Double Sided Microtron (HDSM)
as the fourth and last stage. The maximum output energy is 1508MeV with a beam
current of up to 100µA. The third stage (RTM3) delivers beams from 180MeV to 855MeV
in 15MeV steps. After installation of the extraction system of the HDSM also in the
range of 855MeV to 1508MeV beam extraction in steps of approx. 15MeV will be possible.
Normal conducting accelerating structures in connection with multiple beam recirculation
represent an economical and reliable solution for stable acceleration of the intense
electron beam. The relatively modest ratio between output and input energy of each
stage made it possible to build the microtrons according to the fundamental design
idea, avoiding complicated injection and focusing schemes. Therefore, and due to the
high precision and homogeneity of the end magnets, the transverse and longitudinal
beam transport through the microtrons occurs in a nearly ideal way. Owing to the
extensive beam monitor and computer control system the accelerator complex is easy
to operate, and several automatic optimising routines serve for short beam setup and
optimisation times. The stability of the machine is excellent, the mean time between
corrections by the operator normally being more than ten hours. Due to the highly
stabilized rf amplitude in the acceleration sections the beam intensity can easily
be changed and even pulsed up to more than 110µA with a rise time of 100µs.
|
|
 Informations
 More Links
|
printable version
Imprint
to the top