ICALEPCS1991 - List of Keywords (closed-orbit)

Paper	Title	Other Keywords	Page
S12FC05	PLS Beam Position Measurement and Feedback System	real-time, feedback, detector, controls	427
	J.Y. Huang, J.-H. Kim, J.-W. Lee, M.K. Park, S.C. Won PAL, Pohang, Republic of Korea
	Funding: Work supported by Pohang Iron & Steel Co., Ltd. (POSCO) and Ministry of Science and Technology (MOST), Government of Republic of Korea. A real-time orbit correction system is proposed for the stabilization of beam orbit and photon beam positions in Pohang Light Source. PLS beam position monitor system is designed to be VMEbus compatible to fit the real-time digital orbit feedback system. A VMEbus based subsystem control computer, Mil-1553B communication network and 12 BPM/PS machine interface units constitute digital part of the feedback system. With the super-stable PLS correction power supply, power line frequency noise is almost filtered out and the dominant of beam orbit fluctuations are expected to appear below 15 Hz. DSP board in SCC for the computation and using an appropriate compensation circuit for the phase delay by the vacuum chamber, PLS real-time orbit correction system is realizable without changing the basic structure of PLS computer control system.
DOI •	reference for this paper ※ doi:10.18429/JACoW-ICALEPCS1991-S12FC05
About •	Received ※ 02 December 1991 — Accepted ※ 02 January 1992 — Issued ※ 04 December 1992
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

S16MS03	The LEP Model Interface for MAD	controls, interface, operation, network	546
	F.C. Iselin CERN, Geneva, Switzerland
	During machine studies and trouble-shooting in the LEP machine various optical parameters must be computed, which can be found quickly using the MAD program. However, the LEP operators are not all well acquainted with MAD. In order to ease their task, a simple interface called the LEP model has been written to run on the Apollo workstations of the LEP control system. It prepares jobs for MAD, sends them to a DN 10000 node for execution, and optionally plots the results. The desired machine positions and optical parameters vary between LEP runs. The LEP model contains a powerful selection algorithm which permits easy reference to any combination of positions and optical parameters in the machine. Elements can be chosen by name, by sequence number, or by element class. The choice of optical functions includes closed orbit, Twiss parameters, betatron phases, chromatic functions, element excitations, and many more. Recently matching features have been added. Communication with the control system and with MAD uses self-describing tables, i.e. tables whose columns are labelled with their name and a format code. Experience with this LEP model interface is reported.
DOI •	reference for this paper ※ doi:10.18429/JACoW-ICALEPCS1991-S16MS03
About •	Received ※ 11 November 1991 — Accepted ※ 20 November 1991 — Issued ※ 04 December 1992
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Other Keywords

Page

S12FC05

PLS Beam Position Measurement and Feedback System

real-time, feedback, detector, controls

427

J.Y. Huang, J.-H. Kim, J.-W. Lee, M.K. Park, S.C. Won
PAL, Pohang, Republic of Korea

Funding: Work supported by Pohang Iron & Steel Co., Ltd. (POSCO) and Ministry of Science and Technology (MOST), Government of Republic of Korea.
A real-time orbit correction system is proposed for the stabilization of beam orbit and photon beam positions in Pohang Light Source. PLS beam position monitor system is designed to be VMEbus compatible to fit the real-time digital orbit feedback system. A VMEbus based subsystem control computer, Mil-1553B communication network and 12 BPM/PS machine interface units constitute digital part of the feedback system. With the super-stable PLS correction power supply, power line frequency noise is almost filtered out and the dominant of beam orbit fluctuations are expected to appear below 15 Hz. DSP board in SCC for the computation and using an appropriate compensation circuit for the phase delay by the vacuum chamber, PLS real-time orbit correction system is realizable without changing the basic structure of PLS computer control system.

DOI •

reference for this paper ※ doi:10.18429/JACoW-ICALEPCS1991-S12FC05

About •

Received ※ 02 December 1991 — Accepted ※ 02 January 1992 — Issued ※ 04 December 1992

Cite •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

S16MS03

The LEP Model Interface for MAD

controls, interface, operation, network

546

F.C. Iselin
CERN, Geneva, Switzerland

During machine studies and trouble-shooting in the LEP machine various optical parameters must be computed, which can be found quickly using the MAD program. However, the LEP operators are not all well acquainted with MAD. In order to ease their task, a simple interface called the LEP model has been written to run on the Apollo workstations of the LEP control system. It prepares jobs for MAD, sends them to a DN 10000 node for execution, and optionally plots the results. The desired machine positions and optical parameters vary between LEP runs. The LEP model contains a powerful selection algorithm which permits easy reference to any combination of positions and optical parameters in the machine. Elements can be chosen by name, by sequence number, or by element class. The choice of optical functions includes closed orbit, Twiss parameters, betatron phases, chromatic functions, element excitations, and many more. Recently matching features have been added. Communication with the control system and with MAD uses self-describing tables, i.e. tables whose columns are labelled with their name and a format code. Experience with this LEP model interface is reported.

DOI •

reference for this paper ※ doi:10.18429/JACoW-ICALEPCS1991-S16MS03

About •

Received ※ 11 November 1991 — Accepted ※ 20 November 1991 — Issued ※ 04 December 1992

Cite •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)