Dispersion and Beam Optic Parameter Measurements in the Transport Line (E-Weg) from  DESY II To PETRA III

Sahoo, Gajendra Kumar; Balewski, Klaus; Wanzenberg, Rainer; Ehrlichmann, Heiko; Keil, Joachim

Poster

PUBDB-2017-04128

Dispersion and Beam Optic Parameter Measurements in the Transport Line (E-Weg) from DESY II To PETRA III

Sahoo, G. K. (Corresponding author)DESY* ; Balewski, K.DESY* ; Ehrlichmann, H.DESY* ; Keil, J.DESY* ; Wanzenberg, R.DESY*

2017

8th International Particle Accelerator Conference, IPAC2017, Copenhagen, Denmark, 14 May 2017 - 19 May 2017 [10.3204/PUBDB-2017-04128]

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Please use a persistent id in citations: doi:10.3204/PUBDB-2017-04128

Abstract: The transport line E-Weg extends from the extraction septum in DESY II to the injection septum in PETRA III, and transports electrons at a beam energy of 6.0 GeV. It consists of 3 parts. The first part is in the DESY tunnel, the second part is a long drift space in a slanted tube and the third part is in the PETRA III tunnel. The vertical plane difference between the accelerators is 1.28 m. The optics was derived from initial values at Übergabepunkt (UGP) from a previous optics. The total length of the transfer line is about 203 m. Ten screen monitors are used to estimate the profiles of the beam spot for the optics measurements, while 8 BPMs, mostly adjacent to the screens, are used to compare and control the orbits. Two scrapers are installed on either side of the long drift space to trim the beam dimensions in transverse plane. Two FCTs are used to measure the beam current and the transfer efficiency. The transverse dispersion and beta functions are measured by extracting the beam from DESY at different energies and analysing the beam profiles at the screen as well as positions at BPMs. The details of such measurements are reported in this paper.

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