EP 1265462 A1 20021211 - Device and method for the intensity control of a beam extracted from a particle accelerator
Title (en)
Device and method for the intensity control of a beam extracted from a particle accelerator
Title (de)
Vorrichtung und Verfahren zur Steuerung der Intensität eines aus einem Teilchenbeschleuniger extrahierten Strahls
Title (fr)
Dispositif et méthode de régulation de l'intensité d'un faisceau extrait d'un accélérateur de particules
Publication
Application
Priority
EP 01870122 A 20010608
Abstract (en)
The beam intensity regulator includes an analogue-digital converter (50) which converts an analogue signal (IM) directly representing the measured beam intensity at the accelerator output into a digital signal (IR). A low pass filter filters the signal (IM) to produce a filtered analogue signal (IF). A phase advance regulator samples the signal (IF), compensates for the phase delay and provides the signal (IR) to a comparator (90) An Independent claim is also included for: a regulation method. Beam intensity regulator, for beams extracted from a particle accelerator such as a cyclotron, used for proton-therapy. The particles are generated from an ion source. Regulator includes: (a) a comparator (90) determining the difference ( eta ) between a digital signal (IR) representing beam intensity measured at the accelerator output and a set value of beam intensity (IC); a SMITH predictor (80) which determines from ( eta ), a corrected value beam intensity value (IP); an inverse correspondence table (40) furnishes, from the corrected value (IP). a value (IA) for supply of a current arc for the ion source (20).
IPC 1-7
IPC 8 full level
A61N 5/10 (2006.01); H05H 7/00 (2006.01); H05H 13/00 (2006.01); H05H 13/04 (2006.01)
CPC (source: EP US)
H05H 7/00 (2013.01 - EP US); H05H 13/00 (2013.01 - EP US)
Citation (search report)
- [DA] WO 0040064 A2 20000706 - ION BEAM APPLIC [BE], et al
- [A] FR 2539867 A1 19840727 - THOMSON CSF [FR]
- [A] FR 2749613 A1 19971212 - RENAULT [FR]
- [A] V.J. VANDOREN: "The Smith Predictor: A Process Engineer's Crystal Ball", CONTROL ENGINEERING, May 1996 (1996-05-01), pages 61 - 62, XP000638018
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
DOCDB simple family (publication)
EP 1265462 A1 20021211; CA 2449307 A1 20021219; CN 1247052 C 20060322; CN 1515133 A 20040721; EP 1393602 A1 20040303; JP 2004529483 A 20040924; US 2004155206 A1 20040812; US 6873123 B2 20050329; WO 02102123 A1 20021219
DOCDB simple family (application)
EP 01870122 A 20010608; BE 0200089 W 20020603; CA 2449307 A 20020603; CN 02811473 A 20020603; EP 02737673 A 20020603; JP 2003504721 A 20020603; US 47938003 A 20031125