- Library Home /
- Search Collections /
- Open Collections /
- Browse Collections /
- UBC Theses and Dissertations /
- Construction of an ultra-thin cylindrical drift chamber...
Open Collections
UBC Theses and Dissertations
UBC Theses and Dissertations
Construction of an ultra-thin cylindrical drift chamber for measurement of the rare decay K+ [formula] Pacradouni, Vighen
Abstract
The branching ratio for the decay K+ [formula] has been measured at Brookhaven National Laboratory by the E787 collaboration to be 5.2 x 10-9. The best QCD calculations give a prediction of (.6 -4 6) x 10'. The theoretical equations for this calculation as well as the previous experiment are reviewed. The experiment is in the midst of a major upgrade resulting in a new beam line and a modified detector. The ultra-thin cylindrical drift-chamber with helical cathode strips for measurement of the axial coordinate of the charged particle track is described. A design for charge pre-amplifiers to instrument the cathode strips is discussed. The desired gain was achieved for single amplifiers, however, the problem of ringing and cross-talk when mounted in close proximity remains.
Item Metadata
Title |
Construction of an ultra-thin cylindrical drift chamber for measurement of the rare decay K+ [formula]
|
Creator | |
Publisher |
University of British Columbia
|
Date Issued |
1993
|
Description |
The branching ratio for the decay K+ [formula] has been measured at Brookhaven National Laboratory by the E787 collaboration to be 5.2 x 10-9. The best QCD calculations give a prediction of (.6 -4 6) x 10'. The theoretical equations for this calculation as well as the previous experiment are reviewed. The experiment is in the midst of a major upgrade resulting in a new beam line and a modified detector. The ultra-thin cylindrical drift-chamber with helical cathode strips for measurement of the axial coordinate of the charged particle track is described. A design for charge pre-amplifiers to instrument the cathode strips is discussed. The desired gain was achieved for single amplifiers, however, the problem of ringing and cross-talk when mounted in close proximity remains.
|
Extent |
3285519 bytes
|
Genre | |
Type | |
File Format |
application/pdf
|
Language |
eng
|
Date Available |
2008-09-22
|
Provider |
Vancouver : University of British Columbia Library
|
Rights |
For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.
|
DOI |
10.14288/1.0085435
|
URI | |
Degree | |
Program | |
Affiliation | |
Degree Grantor |
University of British Columbia
|
Graduation Date |
1993-11
|
Campus | |
Scholarly Level |
Graduate
|
Aggregated Source Repository |
DSpace
|
Item Media
Item Citations and Data
Rights
For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.