TY  - CONF
AU  - Hillert, S.
AU  - Holl, P.
AU  - Lechner, P.
AU  - Ischebeck, R.
AU  - Karstensen, S.
AU  - Muller, U. C.
AU  - Ng, J. S. T.
AU  - Roth, S.
AU  - Petzold, G.
AU  - Thom, H.
TI  - The Beam Trajectory Monitor for the TTF-FEL at DESY
IS  - DESY-M-00-04ZD
CY  - Hamburg
PB  - DESY
M1  - PUBDB-2016-02948
M1  - DESY-M-00-04ZD
SP  - 1803-1805
PY  - 2000
AB  - The design, construction and first tests of a prototype of the beam trajectory monitor at the TTF-FEL are presented. With this monitor the off-axis spontaneous undulator radiation is imaged through a set of pinholes onto silicon pixel detectors. This allows to measure simultaneously 12 points of the transverse beam position with an accuracy of better than 10 μm over a length of 5 m. The prototype consists of a pinhole mask and the pixel detectors accurately placed to each other inside a vacuum chamber which is held under beam vacuum. We first present the design and the production technology of the silicon pixel detector. Then the optimization of the pinhole mask and its realization using lithographic methods are discussed. To determine its spatial accuracy the detector is scanned using a laser test stand and a low-intensity electron beam of an electron microscope. The symmetry axis of the detector defines a straight line within 0.4 μm. Additionally, the electron microscope is used to study the radiation hardness of the detector. The sensitivity of the detector to low energy X-rays is measured using a vacuum ultraviolet beam at the synchrotron light source HASYLAB. Finally first calibration measurementsof the BTM prototype detectors are shown.
T2  - The 7th European Particle Accelerator Conference EPAC 2000
CY  - 26 Jun 2000 - 30 Jun 2000, Vienna (Austria)
Y2  - 26 Jun 2000 - 30 Jun 2000
M2  - Vienna, Austria
KW  - talk: Vienna 2000/06/26 (INSPIRE)
KW  - electron positron: linear collider (INSPIRE)
KW  - linear collider: proposed (INSPIRE)
KW  - free electron laser (INSPIRE)
KW  - beam monitoring: beam position (INSPIRE)
KW  - magnet: undulator (INSPIRE)
KW  - synchrotron radiation (INSPIRE)
KW  - semiconductor detector: pixel (INSPIRE)
KW  - radiation: damage (INSPIRE)
KW  - DESY TESLA Linac (INSPIRE)
LB  - PUB:(DE-HGF)29 ; PUB:(DE-HGF)8
DO  - DOI:10.3204/PUBDB-2016-02948
UR  - https://bib-pubdb1.desy.de/record/301889
ER  -