ir 2 status l.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
IR-2 Status PowerPoint Presentation
Download Presentation
IR-2 Status

Loading in 2 Seconds...

play fullscreen
1 / 33

IR-2 Status - PowerPoint PPT Presentation


  • 141 Views
  • Uploaded on

IR-2 Status. 9 Oct. 2003 Stan Ecklund. IR 2 Issues. HOM and Synchrotron Radiation Vertex Bellows Cooling Addition 2002 Q1/Q2 Bellows – more HOM absorbers in 2002 Smoother Q2R forward crotch chamber Q5R vacuum flange heating from HER B1 SR fan Orbit Sensitivity

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'IR-2 Status' - janet


Download Now An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
ir 2 status

IR-2 Status

9 Oct. 2003

Stan Ecklund

MAC Review – IR 2 Status

ir 2 issues
IR 2 Issues
  • HOM and Synchrotron Radiation
    • Vertex Bellows Cooling Addition 2002
    • Q1/Q2 Bellows – more HOM absorbers in 2002
    • Smoother Q2R forward crotch chamber
    • Q5R vacuum flange heating from HER B1 SR fan
  • Orbit Sensitivity
    • Require LEB aimed at Luminosity Monitor
    • IP angles constrained by backgrounds
    • HEB – B1 fan aimed at High Power Dump missing Q5R chamber
    • Quad motion from beam current – HERO and LERO feedbacks
    • Installed Position Monitoring Systems
  • Vacuum
    • Q2 Chamber Leak June 2003
    • Q2 Chamber NEG pumps
    • Radial Ion Pumps

MAC Review – IR 2 Status

near ir
Near IR

MAC Review – IR 2 Status

ir vacuum chambers
IR Vacuum Chambers

MAC Review – IR 2 Status

spectrum from ip bpm
Spectrum From IP BPM
  • B-side (Forward) IP BPM
  • Gated spectrum analyzer in the abort gap
  • Data from May 5 2002 Sasha Novokhatski

MAC Review – IR 2 Status

forward vertex bellows before cooling
Forward Vertex Bellows – Before Cooling

Hottest Point according to model (300 C)

T_VTX2 Thermocouple

( dT = 105 F = 58 C)

Beryllium Vertex Chamber

B1 Chamber

MAC Review – IR 2 Status

forward vtx blws cooling
Forward VTX BLWS Cooling

MAC Review – IR 2 Status

thermocouple locations
Thermocouple Locations

T_V0B270 On Ta foil, z=blws-70mm -y x=0,z=113 mm

T_V1B270 Al Clam, end near IP, -y, theta=270 z=157

T_V2B270 Al clam, corner theta=270, z=17.5

T_VTX2 TC1: Forward alum clamshell (+y)

T_V3B000 Inboard end of blws theta=0

T_V3B135 Inboard end of blws theta=135

T_V3B180 Inboard end of blws theta=180

T_V3B225 Inboard end of blws theta=225

T_V3B270 Inboard end of blws theta=270

T_V3B_O Inboard H2O out, -x +y

T_V4B_O1 Collar H2O out -x

T_V4B_O2 Collar H2O out +x

T_V5B000 SS end of B1 Chamber theta =0

T_V5B180 SS end of B1 Chamber theta =180

T_V3B_AI Air in Bellows, top

T_V6B_AI Air btwn B1 chamber & magnet,+y,z=295mm,slice3/slice4

MAC Review – IR 2 Status

vtx bellows cooling installation
VTX Bellows Cooling Installation

MAC Review – IR 2 Status

improved vtx bellows cooling
Improved VTX Bellows Cooling
  • dT=40 F vs. 105 F before cooling
  • Time constant 100 sec vs. 220 before
  • Hottest location now cooled
  • Expect to handle 4 X HOM Power
  • Next design needs cooled absorber

MAC Review – IR 2 Status

erratic behavior similar to before
Erratic Behavior Similar to Before

MAC Review – IR 2 Status

three states
Three States

MAC Review – IR 2 Status

power
Power

+ Bunch Length factor

MAC Review – IR 2 Status

power sum ib 2
Power / Sum (Ib^2)

MAC Review – IR 2 Status

synchrotron radiation heating by 2 run 2 4 a ler 26 june 2003 q2 and q4 chambers
Synchrotron Radiation HeatingBy 2 Run, 2.4 A LER, 26 June 2003, Q2 and Q4 Chambers

These are the thermocouples which were in warning at high LER current. First fill was 2250mA in pattern by2_t14_fb1200 and second fill was 2400mA in pattern straight by 2.

Rnd. - Rect. transition, -y, bot, z=-20

LEB side,+x,y=0, small Cu finger, z=-2.8 m

LER Q4 vac, +x, z=-3.64 next to flange

MAC Review – IR 2 Status

orbit
Orbit
  • LEB Aimed at Luminosity Monitor
  • Consistent with Backgrounds
  • HEB SR fan to High Power Dump
  • Beam Induced Magnet Motion
    • SY fan heating distorts vacuum chamber
    • Chamber pushes Magnet.
    • Feedbacks adjust dipole correctors to restore orbit

MAC Review – IR 2 Status

lero feedback
LERO Feedback

MAC Review – IR 2 Status

alignment monitoring
Alignment Monitoring
    • LVDT transducers
    • Tilt Sensors
  • New Systems
    • Water Level System
      • 6 sensors, 2 on each raft, 1 in each tunnel
    • Wire Alignment System
      • On A (Backward side)
      • Five (x y) pickups
      • Q2L, Q4L, Q5L
      • Support Tube to Tunnel (20 m)
    • Laser Tracker
      • On B (Forward side)
      • Q4R, Q5R, (4 each), Raft (2), Reference

MAC Review – IR 2 Status

tilt sensor data
Tilt Sensor Data

Mark Petree

MAC Review – IR 2 Status

water level data
Water Level Data
  • Note beam dependence on LRAFT (A side) sensors
  • Andrei Seryi IR breakout

MAC Review – IR 2 Status

wire alignment data
Wire Alignment Data

0.2 mm full scale

Zach. Wolf, Dave Jensen, Kris Dudley, Brenden Dix

MAC Review – IR 2 Status

tracker data
Tracker Data

Catherine LeCocq

Robert Ruland

MAC Review – IR 2 Status

june 2003 q2r vacuum leak
June 2003 Q2R Vacuum Leak
  • Leak started about 16:00 on Friday 27 June 2003
  • Sig 9 and Sig 11 diodes indicate LER backgrounds.
  • Upstream LER cold cathode gauge VGCC3027 shows increase in pressure.
  • He leak check gives no indication.
  • When radial ion pump VP3012 was on it reduces A-side pressure indicating leak is on B-side (incoming LER)
  • Sat. eve leak checked flooding Support Tube with He.
  • Radial pump VP3012 failed after leak check on Sat.
  • Leak gets worse over holiday week.
  • Water seen on RGA on A-side.
  • Water to vacuum leak found in B-side Q2 vacuum chamber on Monday 7 July. New smooth chamber was in service since Nov. 2002.
  • VP3012 resistance increasing over days, but still too low.
  • Other water circuits checked ok.
  • Replaced chamber with original.
  • September startup not affected due to early NEG activation

MAC Review – IR 2 Status

pressure increase
Pressure Increase

B side pressure lower than A side

MAC Review – IR 2 Status

q2 water circuit pump out
Q2 water circuit pump out

Release Water Pressure

Pump circuit

MAC Review – IR 2 Status

july pump down and now
July Pump Down and Now

1

nTorr

MAC Review – IR 2 Status

q2 leak from material flaw
Q2 Leak from material flaw

MAC Review – IR 2 Status

summary
Summary
  • Addressing Heating and Motion Issues
  • New Vacuum chambers needed by 2005
    • Q2 chamber
    • B1
    • Radial Ion pump
    • Bellows / SiC absorbers

MAC Review – IR 2 Status