slide1 n.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
Status of Rod Production at UCSB PowerPoint Presentation
Download Presentation
Status of Rod Production at UCSB

Loading in 2 Seconds...

play fullscreen
1 / 7

Status of Rod Production at UCSB - PowerPoint PPT Presentation


  • 135 Views
  • Uploaded on

This report covers the last week Reporting for: Dan Callahan Susanne Kyre Stephen Jaditz Puneeth Kalavase Jim Lamb. Status of Rod Production at UCSB. assembly. testing. Tests of I2C errors. Visit from Guido Magazzu & Wim Beaumont June 3 to June 7 Following the visit at FNAL

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 'Status of Rod Production at UCSB' - hisa


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
slide1
This report covers the last week

Reporting for:

Dan Callahan

Susanne Kyre

Stephen Jaditz

Puneeth Kalavase

Jim Lamb

Status of Rod Production at UCSB

assembly

testing

tests of i2c errors
Tests of I2C errors
  • Visit from Guido Magazzu & Wim Beaumont June 3 to June 7
    • Following the visit at FNAL
  • Report available
    • http://hep.ucsb.edu/cms/rod/I2c_230_investigation_v.1.2.doc
  • To make a long story short, problem is due to different RC on I2C clock lines going to hybrid and optohybrid
    • Causes wavefronts to change at slightly different times
    • See http://hep.ucsb.edu/cms/rod/TheGreatI2CMysteryv2.ppt
slide3

FE-Hybrid

82W

Parasitic on FE Hybrid CH

SCL

SDA

AOH

CH > CA

Parasitic on AOH CA

82W

Present Electrical circuit

main solutions under investigation
(Main) Solutions under investigation
  • R=82 Ohms  R=0 Ohms
    • As implication for power-on sequence.
    • Would need to power-on control and F.E. at the same time
    • Most robust from I2C stand point
  • Tune one of the R to equalize RC
    • R to AOH ~ 820 ohm
  • Jumper across resistance (see picture next page)
    • Forces same RC
slide5

Solution 6

FE-Hybrid

82W

Parasitic on FE Hybrid CH

SCL

SDA

AOH

Parasitic on AOH CA

82W

PSU

Control

PSU

FE

before

other stuff
Other stuff
  • Still fighting coolant leak
  • Isolated to flowmeters inside fridge
  • Catalog says: flowmeters have vitan o-rings
    • Vitan is "bad" with C6F14
  • Took it apart, observed damaged o-rings

Solving this is highest priority to be able to begin production when I2C business is settled