1 / 5

TRIUMF Qweak Electronics

TRIUMF Qweak Electronics. Des Ramsay Nov 2008. Status of Electronics.

hana
Download Presentation

TRIUMF Qweak Electronics

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. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. TRIUMF Qweak Electronics Des Ramsay Nov 2008

  2. Status of Electronics • now five styles of preamp: Main: 0.5M, 1M, 2M, 4M, 26 kHz Lumi: 0.5M, 1M, 25M, 50M, 17 kHz KDP-A: 0.3M, 0.6M, 1.2M, 2.4M, 25 kHz KDP-B: 4k, 12k, 36k, 100k, 110 kHz SNS: 10k, 100k, 1M, 10M, 16 kHz • 36 VME modules (# 001 and # 003-037) delivered to JLab • 038 to Ohio (Paul) • 039 to U. Virginia (Kent) • 001, 003, 004, and 005 are back at TRIUMF for front-end upgrade. • 14 Main preamps to JLab • 14 Lumi preamps to JLab • 20 more preamps ordered by Roger. Insides ready at TRIUMF, need to be boxed and tested. • four KDP-A and four KDP-B ordered by Kent. November, 2008

  3. Input Cables Large input capacitance increases the noise gain of the first stage. For Qweak we should limit the input cable capacitance to ~200 pf, for example 5m of RG-62. Some typical cables: TYPE Z0(ohm) C(pF/M) diameter(mm) RG-58 53 94.4 5.0 RG-62 93 44.3 6.2 RG-63 125 32.8 10.3

  4. Issues to make sure we address • We need low capacitance cables for the preamp inputs 5 m, RG-62, 93  • We should not forget radiation shielding of the preamps. • We need the same 20 MHz clock to all the integrators • Ideally, the spin flip should be synchronized with the clock • We may want the spin flip signal (“MPS”) in advance of the flip. • If we ground signals in the hall AND in the electronics cage we have to be sure we don’t get bad line noise. It’s easy to float one end, but is it allowed? • We need to test the actual noise early, with the full set-up and DAQ pattern. November, 2008

  5. END

More Related