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