CERN Accelerating science

Article
Report number	CERN-BE-2011-029
Title	Test Measurements of a 20 ms-1 Carbon Wire Beam Scanner
Author(s)	De Freitas, J (CERN) ; Dehning, B (CERN) ; Emery, J (CERN) ; Herranz Alvarez, J F (CERN) ; Koujili, M (CERN) ; Ramos, D (CERN) ; Sapinski, M (CERN) ; Ait-Amira, Y (Franche Comte U.) ; Djerdir, A (IUT, Belfort)
Publication	2011
Imprint	01 May 2011
Number of pages	3
In:	Conf. Proc. C11-05-16.4 (2011) pp.TUPD64
In:	10th European Workshop on Beam Diagnostics and Instrumentation for Particle Accelerators, Hamburg, Germany, 16 - 18 May 2011, pp.452
Subject category	Accelerators and Storage Rings
Free keywords	Carbon wire beam scanner
Abstract	This paper pre­sents the de­sign of the ac­tu­a­tor for the fast and high ac­cu­ra­cy Wire Scan­ner sys­tem. The ac­tu­a­tor con­sists of a ro­tary brushless syn­chronous motor with the per­ma­nent mag­net rotor in­stalled in­side the vac­u­um cham­ber and the sta­tor in­stalled out­side. The fork, per­ma­nent mag­net rotor and two an­gu­lar po­si­tion sen­sors are mount­ed on the same axis and lo­cat­ed in­side the beam vac­u­um cham­ber. The system has to re­sist a bake-out tem­per­a­ture of 200 C and ion­iz­ing radi­a­tion up to tenths of kGy/year. Max­i­mum wire trav­el­ling speed of 20 m/s and a po­si­tion mea­sure­ment ac­cu­ra­cy of 4 um is re­quired. Therefore, the sys­tem must avoid gen­er­at­ing vi­bra­tion and electromagnet­ic in­ter­fer­ence. A dig­i­tal feed­back con­troller will allow max­i­mum flex­i­bil­i­ty for the loop pa­ram­e­ters and feeds the 3-phase lin­ear power driv­er. The per­for­mance of the pre­sent­ed de­sign is in­ves­ti­gat­ed through sim­u­la­tions and ex­per­i­men­tal tests.
Copyright/License	publication: (License: CC-BY)

Email contact: [email protected]