Tuning FLASH for high beam currents July 6 th 2010 J. Branlard.

Slides:



Advertisements
Similar presentations
1 Copyright © 2010, Elsevier Inc. All rights Reserved Fig 6.1 Chapter 6.
Advertisements

Antonin Vacheret DAPNIA/SPhN, CEA Saclay.HAPPEX II Jlab Hall A Electron detectors for HAPPEX2 and He Installation in HRS Linearity tests 4.
Flashcards? Lets Get Started. Question 1 Get Answer.
Peter McIntosh STFC and Cockcroft Institute CI SAC Review 1 – 2 November 2010 SRF and RF Activities.
RFQ Matcher. What am I doing this time?! Concerned that modulations and matcher affect field flatness and frequency These are very small features How.
Conventional e+ source: 300 Hz linac R/D Beam loading compensation study at ATF ECFA LC2013 at DESY KEK Junji Urakawa ICS Chamber including Laser.
J. Branlard ALCPG11 – March 2011 – Eugene OR, USA Results from 9mA studies on achieving flat gradients with beam loading P K |Q L studies at FLASH.
Max V Min V 1/e * (Max V – Min V) RF pickup signal (200 ps/pt averaged over 100 pts), 7.5 µs beam τTime (µs) Pickup voltage (V)
Commercial Strain Gauge Info. A strain gauge manufacturer _page=product_info&products_id=13
Pulley Lab Graph. 1.Get a blank sheet of graph paper.
Cavity Technical Specification IWLC2010 WG3 industrialization session H. Hayano Geneva,Oct.2010.
1 9 mA study at FLASH on Sep., 2012 Shin MICHIZONO (KEK) LCWS12(Sep.24) Shin MICHIZONO Outline I.Achievement before Sep.2012 II.Study items for ILC III.
APS Short Pulse X-ray (SPX) Design Study July 27-29, 2010.
Status of the Fermilab Cold BPM R&D Manfred Wendt Fermilab 10/1/20091LCWA09 Main Linac WG.
Proposed TDR baseline LLRF design J. Carwardine, 22 May 2012.
FLASH. Free-Electron Laser in Hamburg Long Trains, High Beam Loading Possibilities for high-current long bunch train running at FLASH Siegfried Schreiber.
Recent LFD Control Results from FNAL Yuriy Pischalnikov Warren Schappert TTF/FLASH 9mA Meeting on Cavity Gradient Flatness June 01, 2010.
John Carwardine 5 th June 2012 Developing a program for 9mA studies shifts in Sept 2012.
Marc Ross Nick Walker Akira Yamamoto ‘Overhead and Margin’ – an attempt to set standard terminology 10 Sept 2010 Overhead and Margin 1.
Low-Level RF of BEPCII Sun YI IMAC’07 May. 11, 2007 IHEP.
LCWS13, November 2013 At the University of Tokyo W.–D. Möller Status of the TTF3 RF Power Coupler.
Preparation for Sept 9mA studies: Follow-up items from February J. Carwardine, 22 May 2012.
Mike Jenkins Lancaster University and Cockcroft Institute.
Nick Walker (DESY) John Carwardine (ANL) GDE ILC10 Beijing March 2010 Cryomodule String Test: TTF/FLASH 9mA Experiment.
John Carwardine 21 st October 2010 TTF/FLASH 9mA studies: Main studies objectives for January 2011.
Pulley Lab The Graph. Graph 1.Get a blank sheet of graph paper.
John Carwardine 29 October, mA meeting 1. Agenda 9mA workshop Data analysis DAQ refresher / online database 2.
Longitudinal HOM power estimations for pulsed beams.rev W. Weingarten 31 May 20101SPL Cavity WG Meeting.
PAT TESTER CALIBRATION Using the 3200 Electrical Test Calibrator.
John Carwardine 13 th April, 2011 Report on the 9mA program.
FLASH 9 mA Workshop, 2009/01/16Lars Fröhlich (MPY), Martin Staack (MCS4) Machine Protection: Status + Outlook Status of the fast protection system Beam.
Xx-xx-2010, tanks arrive from Snezhinsk to Novosibirsk A.Tribendis, July 19-21, 2010, Snezhinsk 1. Check cavity dimensions on a CMM 2. Assemble and measure.
John Carwardine 20 April 09 Preliminary planning for Aug/Sept studies.
John Carwardine (Argonne) First Baseline Allocation Workshop at KEK September 2010 Experience from FLASH ‘9mA’ experiments Gradient and RF Power Overhead.
Beam tube damping estimations for SPL cavity cont’d W. Weingarten 3 May 20101SPL Cavity WG Meeting.
GDE meeting Beijing (Mar.27, 2010) 1 DRFS LLRF system configuration Shin MICHIZONO KEK LLRF lack layout for DRFS DRFS cavity grouping HLRF requirements.
1 LLRF requirements/issues for DRFS Shin MICHIZONO (KEK) BAW1 (Sep.8, 2010)
Overview of long pulse experiments at NML Nikolay Solyak PXIE Program Review January 16-17, PXIE Review, N.Solyak E.Harms, S. Nagaitsev, B. Chase,
RF control and beam acceleration under XFEL conditions Studies of XFEL-type Beam Acceleration at FLASH Julien Branlard, Valeri Ayvazyan, Wojciech Cichalewski,
מאת: יעקב דדוש. פיסול –בין יחיד לרבים יחידה 1 לתלמיד המתבונן לפניך שתי יצירות פיסוליות. התבונן וכתוב (בשקופית הבאה) מהם ההבדלים בין הפסלים המוצגים לפניך?
Overview Step by step procedure to validate the model (slide 1 and 2) Procedure for the Ql / beam loading study (slide 3 and 4)
John Carwardine TDR Writing: FLASH 9mA Experiment.
Longitudinal dynamic analysis for the 3-8 GeV pulsed LINAC G. Cancelo, B. Chase, Nikolay Solyak, Yury Eidelman, Sergei Nagaitsev, Julien Branlard.
Latest Results on Beam Loaded Experiments at FLASH/TTF Shilun Pei October 27,
Degradation and Recovery of Cavity Performance
TTF/FLASH 9mA Experiment Recent Machine Studies Overview
dependence on QL can not longer be seen
Sastaticket.pk Celebrates Black Friday 2017!
Studies Leader Report: 9mA webex meeting, 15th March 2011
LLRF systems status update
Planning the Experiment
Outlook of future studies to reach maximum gradient and current
Overview of High Pulsed Power domain and their applications
TTF/FLASH 9mA Experiment Recent Machine Studies and Results
التدريب الرياضى إعداد الدكتور طارق صلاح.
برنامج التميز في خدمة عملاء السادة موظفي مكاتب المساعدة القانونية
“Workshop on Linac Operation with Long Bunch Trains” Summary
“Solve Word Problems in Exponential Functions using Microsoft Excel”
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXLINCOLNMEMORIALXXXXXXXXXXXXXXXCREATEDBY:MATTRAGUSAXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXNanoCEMMSXXXX
Ֆլեշմոբները որպես լրացուցիչ կրթության կազմակերպման գործիք
CLIMATE: AN INTRODUCTION.
This is my sheet And this is my sheet.
Summary of the maximum SCRF voltage in XFEL
Status of DESY-PSI-CERN collaboration on development of X-band TDS with variable polarisation: PolariX-TDS Alexej Grudiev on behalf of Polarix-TDS collaboration.
Cooling of C6+ ion beam with pulsed electron beam
Online Pogo Game Customer Service
Pogo Game Customer Care Helpline Number

Call Pogo Contact Phone Number and Enjoy Pogo Game
Presentation transcript:

Tuning FLASH for high beam currents July 6 th 2010 J. Branlard

PLAN-A: Keep FLASH as it is Keep Ql’s around 3e6, and Pk’s as described in excel sheet (flash_wg_ xls) Flat without beam Tilt with beam With 3mA of beam loading – Tilts range from -10.6% to 4.5% – Cavities quench or very close to quench limit – Shortening the pulse won’t help with <1% tilt (eg. 100 usec pulse still shows 2% tilts) – Changing tinj won’t help (eg -50 usec changed tilt from to MV/m) Only solution (if no Ql change) is lowering power 2

PLAN-A: Keep FLASH as it is Extreme tilts Risk of cavity quench I b = 3mA 3

PLAN-A: Keep FLASH as it is 4

5

6

7

8

PLAN B: use low Ql’s, keep Pk’s As described in Shin’s document (PkQl-lik control for ACC6/7 at FLASH, June ) Flat with 3mA beam Flat with 6mA beam No solution for 9mA beam Tilt without beam For 3mA configuration – Ql’s are in the x10 6 range – Tilts range from 6.2% to -2.4% – Shortening the pulse won’t help (eg. 100usec flat top still shows 2% tilts ) – Changing t inj won’t help 9

PLAN B: use low Ql’s, keep Pk’s Extreme tilts Risk of cavity quench I b = 3mA 10

PLAN B: use low Ql’s, keep Pk’s 11

PLAN B: use low Ql’s, keep Pk’s 12

PLAN B: use low Ql’s, keep Pk’s 13

Summary: If Pk’s and Ql’s remain as they are: If Pk’s and Ql’s remain as they are: – Beam ON tilts range from -36% to 15% 200 usec flat top (-13% +5%) – Need to lower gradient for 9mA 23.4 MVm instead of 26.1 MV/m ACC6 cav2 : 1.4 MV/m safe margin If only Ql’s are changed: If only Ql’s are changed: – You can adjust the Ql’s for flat with 3mA Beam OFF tilts range from +6.2% to -2.4% 200 usec flat top (+3.4% to -1.6%) – You can adjust the Ql’s for flat with 6mA Beam OFF tilts range from +36% to -8.6% 200 usec flat top (+12.72% to -4.5%) Need to lower gradient 22.5 in stead of 26.1MV/m – No solution for 9mA 14

Extra slide: tilt with 1mA 15

Extra slide: tilt with 1mA Tilts < 0.6 MV/m 16

Extra slide: if more tilting allowed 17

Extra slide: if more tilting allowed 18

19 Extra slide: if more tilting allowed

20 Extra slide: if more tilting allowed

21 Extra slide: if more tilting allowed