| Stage No. |
I
RTM 1
MAMI A1 |
II
RTM 2
MAMI A2 |
III
RTM 3
MAMI B |
IV
HDSM
MAMI C |
| Injection |
100keV DC-guns (thermoionic for standard and
GaAsP-photocathode for polarized beam),
cw-linac (chopper, prebuncher and three accelerating
sections) |
| General |
| Input Energy [MeV] |
3.97 | 14.86 | 180 | 855.1 |
| Output Energy [MeV] |
14.86 | 180 | 855.1 | 1508 |
| No. of recirculations |
18 | 51 | 90 | 43 |
| Magnet System |
| Flux density [T] |
0.1026 | 0.555 | 1.2842 | 1.53 - 0.95 |
| Gap width [mm] |
60 | 70 | 100 | 85 - 139 |
| Max. orbit diameter [m] |
0.964 | 2.166 | 4.432 | 9.20 |
| Weight per magnet [t] |
1.3 | 43 | 450 | 250 |
| Number of quadrupoles and correctors |
2 / 72 | 4 / 204 | 4 / 360 | 8 / 356 |
| RF System |
| Frequency [GHz] |
2.45 | 2.45 | 2.45 | 2.45 / 4.90 |
| No. of klystrons |
1 | 2 | 5 | 4 / 5 |
| No. of sections |
1 | 2 | 5 | 8 / 5 |
| Linac length (el.) [m] |
0.80 | 3.55 | 8.87 | 8.57 / 10.10 |
| RF power dissipation [kW] |
8 | 48 | 102 | 117 / 128 |
| RF beam power [kW] |
1.09 | 16.5 | 67.5 | 38 / 28 |
| Energy gain / turn |
0.599 | 3.24 | 7.50 | 16.64 - 13.9 |
| Additionally two 2.45GHz matching/vernier sections and a 4.90GHz double section with one klystron are needed for beam matching between the RTMs and the HDSM. |
| RF Structure |
On-axis-coupled biperiodic standing wave, vacuum-brazed
OFHC copper, beam aperture 14mm @ 2.45GHz and 10mm @ 4.90GHz diameter |
| Klystrons |
2.45GHz: THALES/TH2075 resp. TH2174 and CPI/VJS-7960M, 50kW cw max.
4.90GHz: THALES/TH2166, 50kW cw max. |
| Extraction |
RTM3: From each even numbered return path,
i.e. E(out)=180+2n*7.5MeV, n=1..45
HDSM: at present 1508MeV, later on from each recirculation path in steps of approx. 15MeV |
Beam
855MeV 100µA |
Energy spread 13keV (FWHM)
Energy drifts 100keV (FWHM) (with energy stabilization: ~1keV)
Horizontal Emittance 13π*µm*rad (1σ)
Vertical Emittance 0.84π*µm*rad (1σ) |
Beam
1508MeV 100µA |
Energy spread 110keV (FWHM)
Horizontal Emittance 27π*µm*rad (1σ)
Vertical Emittance 1.2π*µm*rad (1σ) |
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