P AUL SCHERRER INSTITUT. Diagnostics Overview SwissFEL Injector

Transkript

1 P AUL SCHERRER INSTITUT Diagnostics Overview SwissFEL Injector

2 Diagnostics Overview SwissFEL Injector > Diagnostics by Purpose > Commissioning > Operation / Feedbacks > Beam Parameter Changes (on User Request) > Troubleshooting! > Diagnostics by Type > Transverse Position > Transverse Profile > Longitudinal Position > Longitudinal Profile! > Measurement Infrastructure 2

3 Diagnostics for Commissioning > Must be operational as early as possible > Externally calibrated monitors (WCM, ICT, SCR) available on Day 1 > Some monitors require beam for calibration (BPMs) > Enable first beam through machine > Find errors in beamline > Optics matching > Demonstrate beam parameters (charge, emittance, bunch length) required for SASE 3

4 Diagnostics for Operation > Monitor accelerator operation > Source for feedbacks > Reliable, hands-off operation 4

5 Diagnostics for Beam Parameter Changes > On user request: change > Bunch charge > Bunch length > Beam energy > After every parameter change, tune: > Emittance > Bunch length 5

6 Diagnostics for Troubleshooting > Primarily during initial commissioning > Also helpful later during operation 6

7 Diagnostics by Type > Charge > Wall Current Monitor > Differential Integrating Current Transformer > Cavity Beam Position Monitor > Transverse Position > Cavity Beam Position Monitor > Transverse Profile > Screen Monitor (OTR / Scintillator) > Optical Synchrotron Radiation Monitor > Wire Scanner > Longitudinal Position (Arrival Time) > Bunch Arrival Monitor > Wall Current Monitor > Longitudinal Profile > Transverse Deflecting RF Structure > Multi-Color Bunching Monitor (CSR / CDR) 7

8 Differences to Injector Test Facility > Replace scopes and PCs for data acquisition by FPGA systems as much as possible: > Most monitors will operate at 100 Hz * > Most monitors will support beam synchronous data acquisition * > Most monitors will be able to provide data to the feedback system * > Some monitors will be able to distinguish the two bunches > Additional monitors > Loss monitors > Laser heater overlap monitors (longitudinal / transverse) > Suppressed monitors > Electro-optical monitors > All wall current monitors except the first > OTR in bunch compressor > Series of screens in FODO section > All wire scanners except two! * with the exception of a few transverse profile monitors that will be equipped with inexpensive cameras for just looking 8

9 Task Distribution > Project > Define requirements > Agree with GFA management on task distribution > Provide resources as agreed with GFA management > Diagnostics Section > Propose technical solution > Present technical solution in a review > Oversee fabrication, installation and component commissioning > Provide expert applications > Controls > Provide controls infrastructure > Provide Epics servers > Beam Dynamics / Commissioning / Operation Group > Oversee system acceptance test for every component > Commissioning with beam > Provide beam dynamics applications 9

10 Infrastructure Strahlengang Technische Galerie Zentrale Infrastruktur DSCR Schirmmonitor Szintillator OTR-Schirm Encoder Filter Lampe Linsen- oder Spiegel-Optik Kamera TTL- Stromversorgung Bildverarbeitung auf FPGA Schrittmotor Vakuumpumpe Motor- Kamera- mit PC Feedback mpressionsonitor Terahertz- Strahlung Fokussier- Spiegel Pyro- Detektor Auslese Controller Daten- Speicherung 10

11 DS Infrastructure Stromversorgung Kamera- mit PC DCSR Kompressions- Monitor Terahertz- Strahlung Fokussier- Spiegel Pyro- Detektor Auslese Controller Daten- Speicherung Feedback DWSC Draht-Scanner Szintillierende Faser Encoder LWL mit grossem Querschnitt Auslese-Elektronik PMT LED Schrittmotor Motor- Kontroll-CPU 11

12 DCSR Infrastructure Feedback z Streak Camera DWSC Draht-Scanner Szintillierende Faser Druck- Messung gepulstes Gasventil (x-y-z) Encoder LWL mit grossem Querschnitt etof Flugzeit- Spektrometer xy- Tisch Auslese-Elektronik PMT LED 3 4 Vakuumpumpen Schrittmotor Motor- Datennahme Hochspannungs- Netzteil Motorsteuerung & Encoder-Auslese Kontroll-CPU Feedback 12

13 DTSC Terahertz Streak Camera DWS Infrastructure Druck- Messung gepulstes Gasventil (x-y-z) Lasertisch Terahertz- Erzeugung ~10 Motoren Detektoren Kamera LWL mit grossem Querschnitt etof Flugzeit- Spektrometer xy- Tisch Not-Aus- Ventil evakuiertes Rohr LED Gasversorgung (nicht brennbar) Laser Datennahme 3 4 Vakuumpumpen Hochspannungs- Netzteil Motorsteuerung & Encoder-Auslese Kontroll-CPU Feedback Synchronisations- r 13

14 Detektoren Kamera Infrastructure Lasertisch evakuiertes Rohr Synchronisations- DEOM Elektro- Optischer Monitor Pickup Motor & Encoder Zeilen-Kamera Laser Auslese & Feedback Synchronisations- DICT Strommonitor ICT Strahlstrom- Transformator Auslese Feedback 14

15 O Infrastructure Synchronisations- DICT Strommonitor ICT Strahlstrom- Transformator Auslese Feedback Elektrische Leitungen Lichtwellenleiter Gas Nicht gezeichnet: Stromversorgung Ethernet 15

16 Comments > Slit is before screen in SIND100 > BPM in low-energy spectrometer > 2 BPMs in LH > Screen after first S-band cavity in booster > BPM between X-band cavities > Wire scanner directly after spectrometer dipole > Faraday cup? > Wall current monitor after bunch compressor 16