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 Boards and Fibers LED Boards and Fibers InstalledInstalled

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

Installation of the Installation of the SystemSystem

Summer 2004Summer 2004

Some Initial Data Some Initial Data

Some Initial Data Some Initial Data

Some Initial Data Some Initial Data

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