Status of MAMI C
Hans-Jürgen Arends
CB-Meeting, Basel October 4-6, 2006
The Harmonic Double Sided Microtron (HDSM)for MAMI C
LINAC I (4.90GHz)
LINAC II (2.45GHz)
10m
43 turnsB=1.539T
max
Injection 855MeV
Extraction 1507MeV
No. 2
No. 1No. 4
No. 3
Matching-Section4.90GHz
Status at the Glasgow-Meeting:
The next months (Sept):
•Final setup and technical commissioning of the 4.90 GHz linac, rf-systems, magnets and beam diagnostics devices of the linac axis.• first injection test
Vacuum tubes and steering magnets
193 tubes („harp“), 384 steering magnets
first vacuum chambermanufacturedin the Institute
7m
All 4 dipole vacuum chamberswere fully manufactured atKPH (welding of Al bars andplates) and are installed.
90° bending dipoles vacuum chambers
free aperture in x: ± 8mm and y: ± 7mm
Next steps: (2006)
• first tests in diagnostic pulse mode (very low beam power) up to max. energy of 1.5 GeV• guiding beam in the beam transfer tunnel• tests in cw-operation and high current (100A)• tests of all beam transfer systems (A1, A2, A4)• first tests for experiments (only 1.5 GeV) From 2007 on:
• beam for experiments (1500 MeV, tests, data taking)• optimal orientation of polarization in all halls and for all energies possible by use of Wien-filter • variable beam extraction (in steps of ~15 MeV between 872 MeV and 1320 MeV, and 1500 MeV)
Beam Extraction:
correction magnets correction magnets
Extraction System of the HDSM
turn 43
fixed extraction magnet (1.5GeV)
turn 30
turn 1
movable extraction magnet(0.87GeV – 1.32GeV)
Extraction beam paths