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The MuLan Detector The MuLan Detector Calibration SystemCalibration System
Christopher J. ChurchChristopher J. ChurchJames Madison UniversityJames Madison University
April 23, 2005April 23, 2005
Overview:Overview:
μLan ProjectμLan Project Detector Calibration SystemDetector Calibration System Current StatusCurrent Status Data AnalysisData Analysis Things to comeThings to come
μLan Project: What is it?μLan Project: What is it?
Collaborative effort Collaborative effort to achieve a one part to achieve a one part per million (PPM) per million (PPM) measurement of the measurement of the muon lifetimemuon lifetime
The The Paul Scherrer InstitutPaul Scherrer Institut Villigen, SwitzerlandVilligen, Switzerland
The Experiment:The Experiment:
DetectorsDetectors
PhotomultiplPhotomultiplier Tubesier Tubes Scintillation Scintillation
MaterialMaterial
Light Light GuidesGuides
ee++
Detector Calibration Detector Calibration SystemSystem
The detector calibration system The detector calibration system allows simulations of muon decay to allows simulations of muon decay to be run as well as individual detector be run as well as individual detector testingtesting
Using LED’sUsing LED’s
The LED Pulser BoardsThe LED Pulser Boards Fiber Optic Connection Fiber Optic Connection AssemblyAssembly
LED System:LED System: Concept to RealityConcept to Reality
Driver BoxesDriver Boxes
Driver BoardsDriver Boards
ECL to TTL ECL to TTL BoardsBoards
Driver BoardsDriver Boards
Some Initial Data Some Initial Data
Counts Time (ns)0 25765.5
17449 25766.585257 25767.5124265 25768.5
0 25769.5150493 25770.5149529 25771.583088 25772.5
0 25773.5136994 25774.5341488 25775.5388362 25776.5
0 25777.5264965 25778.5133111 25779.5107406 25780.5
0 25781.531407 25782.566330 25783.5
Some Analysis to Come...Some Analysis to Come...
Consistent output from each LEDConsistent output from each LED Any anomalous features in the dataAny anomalous features in the data
Current StatusCurrent Status
The Calibration System was The Calibration System was installed on the detector July installed on the detector July 20042004
The System is currently The System is currently functioning on for 50% of the functioning on for 50% of the detectors in the balldetectors in the ball
The Future…The Future…
Currently plans are being developed to Currently plans are being developed to bring the remaining 50% of detector LEDs bring the remaining 50% of detector LEDs
online during the summer of 2005online during the summer of 2005
AcknowledgmentsAcknowledgments
Dr. Kevin Giovanetti, Eric Bartel, Matt Miller, and Dr. Kevin Giovanetti, Eric Bartel, Matt Miller, and Rebekah Esmaili Rebekah Esmaili http://csm.jmu.edu/physics/giovanetti/GiovanettiResearchGroupWeb/summer2004/index.htmhttp://csm.jmu.edu/physics/giovanetti/GiovanettiResearchGroupWeb/summer2004/index.htm
T.I. Banks et al. “MuLan Progress Report 2004”T.I. Banks et al. “MuLan Progress Report 2004” The μLan Collaboration: Boston U., U. of Illinois The μLan Collaboration: Boston U., U. of Illinois
Urbana-Champaign, U. of Kentucky, U of CA, BerkeleyUrbana-Champaign, U. of Kentucky, U of CA, Berkeleyhttp://ten.npl.uiuc.edu/exp/mulan/muLanMain.htmlhttp://ten.npl.uiuc.edu/exp/mulan/muLanMain.html
National Science FoundationNational Science Foundation KAMLANDKAMLAND
http://www.awa.tohoku.ac.jp/html/KamLAND/http://www.awa.tohoku.ac.jp/html/KamLAND/
PSI Experiment R99.07.01