New Design of High Order Modes Electronics in MTCA.4 Standard for Flash and the European XFEL
Samer Bou Habib , Adam Abramowicz , Nicoleta Baboi , Schlarb Holger
AbstractAt free-electron linear accelerators, various High Or- der Modes (HOM) - both monopole and dipole - are ex- cited. Extensive studies at DESY have shown that mon- itoring and analysis of some of these modes can be used for different applications including Beam Position Mon- itors (BPMs) and the reduction of wake-fields, the mea- surement of the beam phase with-respect-to RF signal in cavities, and the measurement of cavity alignment in the 1.3 GHz cryo-modules. Three frequencies were chosen for further experiments: the 1.3 GHz base frequency from the klystron, the 1.7 GHz dipole mode and the 2.4 GHz monopole mode. In order to realize the monitoring and analysis requirements, very high resolution measurements in amplitude, phase and shape (time resolution) are re- quired for all three frequencies simultaneously. In this pa- per, we present the new HOM electronics prototype includ- ing a microstrip and stripline RF tri-passband filter design and measurements and the specialized MTCA.4 Rear Tran- sition Module for HOM measurements with an ultra-fast high-resolution AMC digitizer.
|Publication size in sheets||0.5|
|Book||Martin Ian, Rehm Guenther (eds.): Proceedings of International Beam Instrumentation Conference, 2013, Oxford, UK., Diamond Light Source, ISBN 978-3-95450-127-4|
|Publication indicators||= 3.0|
|Citation count*||3 (2020-08-26)|
* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.