Introduction Spectroscopy Objective

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Spectroscopy Electronic Hydrogen Muonic Hydrogen .876 ± .008 fm .8409 ± .0004 fm In an effort to help solve the Proton Radius Puzzle, the MUon proton Sca:ering Experiment (MUSE) will be the first to simultaneously extract the radius from ep and μp sca:ering under idenFcal condiFons. During June ’17 I traveled to PSI, in Switzerland, to build and test a straw tube tracker during a prototyping phase of the experiment. Introduction I worked with the chief designer to build an STT prototype with 160 straw tubes. The goal for this detector is to efficiently measure driR Fme. Data from June 17 is being analyzed to assess the quality of the prototype. Objective Straws inflate the tubes with a mixture of 90% argon and 10% CO 2 gas to 1 atmosphere above standard pressure to provide mechanical stability. ParFcles ionize gas inside the straw tube, creaFng a signal at the anode wire. Results & Conclusion Approach ParFcle Sca?ering Electron-Proton (ep) Muon-Proton (μp) .877 ± .006 fm ??? Fig. 1: Puzzle data and MUSE detector area setup Fig. 3: All straw tube components Fig. 4: ParFcle traveling through cross secFon of a straw tube Fig. 6: Three examples of parFcle trajectory through a straw tube, and indicators of corresponding driR Fme Fig. 2: STT in πM1 beamline A June ‘17 driR Fme plot is shown. Ideally the plot will have a “shark fin” shape, featuring a clear range of minimum to maximum driR Fme and low noise interference outside. The gas mixture and all straw tube materials seemed to be reliable and efficient. CoordinaFng construcFon with soRware mapping presented some challenges and will need to be mastered before official data collecFon begins. Once mapping was resolved, the data looked promising. The analysis soRware successfully reconstructed parFcle tracks and all data plots. Close to wire Close to wall Average Fig. 5: Run 291, Plane 1 DriR Time

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ElectronicHydrogen MuonicHydrogen.876±.008fm .8409±.0004fm

InanefforttohelpsolvetheProtonRadiusPuzzle,the MUon proton Sca:ering Experiment (MUSE)will be the first to simultaneously extract theradius from ep andμp sca:ering under idenFcalcondiFons. During June ’17 I traveled to PSI, inSwitzerland,tobuildandtestastrawtubetrackerduringaprototypingphaseoftheexperiment.

IntroductionIworkedwith the chief designer tobuild anSTTprototypewith160strawtubes.ThegoalforthisdetectoristoefficientlymeasuredriRFme.DatafromJune’17isbeinganalyzedtoassessthequalityoftheprototype.


Straws inflatethetubeswith a mixture of 90%argon and10%CO2 gasto 1 atmosphere abovestandard pressure toprovide mechanicalstability.ParFclesionizegas inside the strawtube, creaFng a signalattheanodewire.

Results & ConclusionApproach


Sca?eringElectron-Proton(ep)Muon-Proton(μp).877±.006fm ???


Fig.3:Allstrawtubecomponents Fig.4:ParFcletravelingthroughcrosssecFonofastrawtube



AJune‘17driRFmeplotisshown.Ideallytheplotwill havea “sharkfin” shape, featuringaclearrangeofminimumtomaximumdriRFmeandlownoiseinterferenceoutside.Thegasmixture and all straw tubematerials seemedto be reliable and efficient. CoordinaFngconstrucFonwithsoRwaremappingpresentedsomechallengesandwillneedtobemasteredbefore official data collecFon begins. Oncemapping was resolved, the data lookedpromising. The analysis soRware successfullyreconstructedparFcletracksandalldataplots.