Difference between revisions of "Minutes-4-1-2010"
m (Text replacement - "http://argus.phys.uregina.ca/cgi-bin/private" to "https://halldweb.jlab.org/doc-private") |
|||
(6 intermediate revisions by one other user not shown) | |||
Line 1: | Line 1: | ||
− | |||
April 1, 2010 FDC meeting | April 1, 2010 FDC meeting | ||
Line 7: | Line 6: | ||
# Electronics | # Electronics | ||
− | #* finalizing PCB design (Fernando, Kim) [[Media:Board_Improvements.docx|Board Improvements]] | + | #* finalizing PCB design (Fernando, Kim) [[Media:Board_Improvements.docx|Board |
− | #* follow up on the threshold investigations ([ | + | Improvements]] |
+ | #* follow up on the threshold investigations | ||
+ | ([https://halldweb.jlab.org/doc-private/DocDB/ShowDocument?docid=1470 | ||
+ | GlueX-doc-1470])(Fernando) | ||
# Cathode frame | # Cathode frame | ||
#* cathode redesign (Bill, Roger) | #* cathode redesign (Bill, Roger) | ||
# Wire winding update | # Wire winding update | ||
− | #* info about the Monday meeting discussing the IUCF phase 3 contract (Beni) | + | #* info about the Monday meeting discussing the IUCF phase 3 contract (Beni) |
− | #* possibilities for wire stringing at JLab [http://www.jlab.org/Hall-D/detector/fdc/WireStringing/WireStringingAtJLab.pdf preliminary estimate] (Lubomir) | + | #* possibilities for wire stringing at JLab |
+ | [http://www.jlab.org/Hall-D/detector/fdc/WireStringing/WireStringingAtJLab.pdf | ||
+ | preliminary estimate] (Lubomir) | ||
# Full scale prototype tests (Beni) | # Full scale prototype tests (Beni) | ||
− | #* wire/cathode cleaning and HV test results | + | #* wire/cathode cleaning and HV test results |
#* future plans | #* future plans | ||
# Other | # Other | ||
Line 25: | Line 29: | ||
== cathode frame == | == cathode frame == | ||
− | Pictures are prepared by Bill but not yet sent out. Redesign daughter boards, to fit dimensions. | + | Pictures are prepared by Bill but not yet sent out. Redesign daughter boards, |
− | Expansion of cathode film due to stretching is not compensated for in the current design. Nothing is | + | to fit dimensions. |
− | currently planed to accommodate for this effect. Main worry of Eugene is the soldering of the flex | + | Expansion of cathode film due to stretching is not compensated for in the |
− | boards to the film. Need one good trained person to do this job. 1.3cm hole in the middle of the | + | current design. Nothing is |
− | cathode boards is fixed. On the sides where the strips are split in two make cut strait while the | + | currently planed to accommodate for this effect. Main worry of Eugene is the |
+ | soldering of the flex | ||
+ | boards to the film. Need one good trained person to do this job. 1.3cm hole in | ||
+ | the middle of the | ||
+ | cathode boards is fixed. On the sides where the strips are split in two make | ||
+ | cut strait while the | ||
strips ending at the border of the 1.3cm Radius hole should be kept round. | strips ending at the border of the 1.3cm Radius hole should be kept round. | ||
Design finished in two weeks. | Design finished in two weeks. | ||
Line 40: | Line 49: | ||
more R53 further to the right to allow the gas lines more space. | more R53 further to the right to allow the gas lines more space. | ||
humiceal on the wire frames inside the gas volume might be problematic in the | humiceal on the wire frames inside the gas volume might be problematic in the | ||
− | long run of operating the chambers. There is some concern that chemical reactions | + | long run of operating the chambers. There is some concern that chemical |
− | might over a long time period with the humiceal might render the chamber inoperable. | + | reactions |
+ | might over a long time period with the humiceal might render the chamber | ||
+ | inoperable. | ||
== preamplifier card == | == preamplifier card == | ||
− | variation in threshold is largest within a given chip. So no special chip selection is needed | + | variation in threshold is largest within a given chip. So no special chip |
− | or different threshold lines for different chips on the same preamplifier board. | + | selection is needed |
+ | or different threshold lines for different chips on the same preamplifier | ||
+ | board. | ||
MIP signals are well above the noise. see GlueX-Doc-1470 | MIP signals are well above the noise. see GlueX-Doc-1470 | ||
Line 52: | Line 65: | ||
== Room for construction == | == Room for construction == | ||
− | there will be a meeting on Friday to discuss this further and also account for the necessary | + | there will be a meeting on Friday to discuss this further and also account for |
− | space needed if the wire frames would be strung there at Jlab rather than at IUCF. | + | the necessary |
+ | space needed if the wire frames would be strung there at Jlab rather than at | ||
+ | IUCF. | ||
+ | |||
+ | ~ | ||
+ | "apr_1_2010.txt" 70L, 2430C 1,1 All |
Latest revision as of 17:13, 24 February 2017
April 1, 2010 FDC meeting
Contents
Tentative Agenda
- Electronics
- finalizing PCB design (Fernando, Kim) Board
Improvements
- follow up on the threshold investigations
([https://halldweb.jlab.org/doc-private/DocDB/ShowDocument?docid=1470 GlueX-doc-1470])(Fernando)
- Cathode frame
- cathode redesign (Bill, Roger)
- Wire winding update
- info about the Monday meeting discussing the IUCF phase 3 contract (Beni)
- possibilities for wire stringing at JLab
[http://www.jlab.org/Hall-D/detector/fdc/WireStringing/WireStringingAtJLab.pdf preliminary estimate] (Lubomir)
- Full scale prototype tests (Beni)
- wire/cathode cleaning and HV test results
- future plans
- Other
- off-site production space update
Minutes
Participants: Eugene, Bill, Glenn, Casey, Simon, Fernando, Kim, Roger, Beni
cathode frame
Pictures are prepared by Bill but not yet sent out. Redesign daughter boards, to fit dimensions. Expansion of cathode film due to stretching is not compensated for in the current design. Nothing is currently planed to accommodate for this effect. Main worry of Eugene is the soldering of the flex boards to the film. Need one good trained person to do this job. 1.3cm hole in the middle of the cathode boards is fixed. On the sides where the strips are split in two make cut strait while the strips ending at the border of the 1.3cm Radius hole should be kept round. Design finished in two weeks.
wire frames
check Fernando's list. fiducials for wire positioning will be white ink and behind the solder pads. no holes on the periphery but other means to apply fixtures for cables. more R53 further to the right to allow the gas lines more space. humiceal on the wire frames inside the gas volume might be problematic in the long run of operating the chambers. There is some concern that chemical reactions might over a long time period with the humiceal might render the chamber inoperable.
preamplifier card
variation in threshold is largest within a given chip. So no special chip selection is needed or different threshold lines for different chips on the same preamplifier board. MIP signals are well above the noise. see GlueX-Doc-1470
Room for construction
there will be a meeting on Friday to discuss this further and also account for the necessary space needed if the wire frames would be strung there at Jlab rather than at IUCF.
~ "apr_1_2010.txt" 70L, 2430C 1,1 All