Detailed technical information and a copy of the users manual for muon physics can be found at the website is maintained by professors thomas coan and jingbo ye of southern methodist university, with whom teachspin collaborated in developing this exciting apparatus. Physics for show does muon physics proving einsteins theory of special relativity muon decays, change in time, and muon lifetime. The high energy particles studied in this lab are so called cosmic muon, i. Role in new physics searches robert szafron 1 radcorloopfest. December 16, 2016 the average lifetime of the muon has a well known value 4. October 24, 2017 the purpose of this experiment is to demonstrate the existence of a speed limit on the motion of particles by measuring the speed of cosmicray muons, and to demonstrate the relativistic dilation. Muon physics the muon is an elementary particle and one of the fundamental constituents of matter. The muon is a fundamental particle that is part of the standard model of particle physics. Manual of diagnostic ultrasound volume 1 4 properties of ultrasound sound is a vibration transmitted through a solid, liquid or gas as mechanical pressure waves that carry kinetic energy. We shall therefore assume that the particle physics aspectsarewellunderstood. This experiment is based upon an instrument designed by thomas coan and jingbo ye at southern methodist university in dallas, texas. Dec 23, 2019 the study was originally conceived as an extension to the upperdivision modern physics laboratory at the university of hawaii at hilo and used the teachspin muon physics apparatus abbreviated tsmp below from that lab. It is a type of lepton particle, similar to the electron but with a heavier mass.
Experiments in the relativistic kinematics of the universal speed limit and time dilation mit department of physics dated. This experiments instrument uses modern and inexpensive electronics to. We built the effort at the university of illinois at urbanachampaign, where dave hertzog was a faculty member since 1986 and peter kammel since 2000. Advanced physics lab experiments teachspin, inc buffalo, ny. Conceptual introduction to muon physics 2 of 4 david van baak, 6182010 an e is a charged particle, itself certain to cause ionization as it moves through the scintillator. The importance of rare muon processes with lepton flavor violation is highly stressed, together with precision measurements of normal muon decay. Muons are very similar to electrons, apart from the fact that a muon has about 200 times more mass than an electron. Make sure the hv adjust knob on the detector is at position 10. Advanced experimentation laboratory university of california, berkeley contents 1 description of the muon lifetime experiment muo1 2 muon lifetime experiment photos2 3 before the 1st day of lab3 4 objectives 3 5 introduction 4 6 apparatus 4. I n the web site of kek, the high energy accelerator research organization, in japan, is a page that describes the operation of the 550 and its controls, and gives a list of specifications.
The purpose of this lab is to make measurements of the muon lifetime and directionality of the observed muon flux. Muons and electrons interact with matter only electromagnetically or by the weak nuclear force. Quarknet cosmic ray muon detector users manual series 6000 daq. If we take a muon and observe it in its rest frame, we can never tell in advance at exactly which moment the muon will decay, even if we know exactly when the muon was created. Cosmic rays and the muon lifetime1 lunds universitet. Precision muon physics by gorringe and hertzog 2015 william j. A units in high energy physics 9 b and, nand and or gates 10 c report tips 11. Notice that the solid angle for covering the entire sphere area 4. Department of physics and astronomy the university of. Welcome to the precision muon physics group at the university of washington introduction. Follow the suggested outline in the teachspin manual student exercises. Muo muon lifetime experimentation lab university of california.
If the probability that a muon decays in some small time interval dt is dt, where is a constant decay rate that characterizes how rapidly a muon decays. Quarknet cosmic ray detection system manual daniel balick i. For this reason, the muon s anomalous magnetic moment is normally used as a probe for new physics beyond the standard model rather than as. We will be measuring the muon halflife in our own experiment. Conveniently, the typical energy deposited in this ionization process is about. We will take the muon as an example of a decaying particle but the following discussion is a general one and applies to all unstable particles. For each lab, a suggested threshold setting is given in the setup instructions, but this is. Advanced physics laboratory manual department of physics. Bhupal dev,a werner rodejohann,b xunjie xu,b yongchao zhanga adepartment of physics and mcdonnell center for the space sciences, washington university, st. Muon physics advanced laboratory instrument by teachspin. Set high voltage to 1100 to 1200 vthis would read 11.
Make sure that the pulser switch on the top of the photomultiplier housing is set to off before you take any data. Apparatus and demonstration notes temple university. When a muon reaches the 1s state of a muonic atom, it can decay or be captured on a bound proton. Cosmic rays and the muon lifetime1 particle physics. The instrument described in this manual permits you to measure the charge averaged mean muon lifetime in plastic scintillator, to measure the relative flux of muons as a function of height above sealevel and to demonstrate the time dilation effect of. Muon physics, muon lifetime experiments, relativistic. Pdf muon decay and physics beyond the standard model. Pedagogical muon lifetime experiment in response to the dearth of highquality experiments for undergraduate physics majors, professor jingbo ye and i have developed a novel pedagogical muon lifetime experiment specifically intended for undergraduate physics laboratory instruction. Measurement of muon lifetime san francisco state university. Quarknet cosmic ray muon detector users manual series. Muons have almost exactly the same properties as electrons except they are heavier. In this experiment you will measure the muon lifetime. User supplied detailed technical information and a copy of the users manual for muon physics can be found at. The validity tests of quantum electrodynamics qed in the simple muonic system such as muonium, muonic hydrogen, and heavier muonic atoms are discussed.
The manual for this module is no longer readily available. The vertical muon intensity at sea level is a quantity which varies with the geomagnetic latitude, altitude, solar activity and atmospheric conditions. If we take a muon and observe it in its rest frame, we can never tell in advance at exactly which moment the muon will decay, even if we know exactly when the. Very soon after, in 1941, the muon halflife was measured by rasetti and coworkers and found to be t 12 1. Teachspin muon physics manual free download as pdf file. Muon physics muon decay time distribution the decay times for muons are easily described mathematically. Coan and ye, a compact apparatus for muon lifetime measurement and time dilation demonstration in the undergraduate laboratory. The decay of muons sherman ip department of physics and astronomy, university college london sherman. A simple, physicsmotivated machine and electronicsshop project for university students s. The instrument described in this manual permits you to measure the charge averaged mean muon lifetime in plastic scintillator, to measure the relative flux of. A pillar of the standard model bradley lee roberts department of physics, boston university, boston, ma 02215, u. This manual is organized to guide the experimenter through a series of suggested procedures.
The muon s anomalous magnetic dipole moment is also sensitive to contributions from new physics beyond the standard model, such as supersymmetry. Detailed technical information and a copy of the users manual for muon physics can be found at the website is maintained by professors. If the probability that a muon decays in some small time interval dt is. If we are sure the muon has s topped inside the liquid scintillator box, one just has to wait a few microsecond and a second pulseof light in left and right detectors will indicate the decay of the muon. At the end of this lab you should have a response to the following questions. Dunham, editor department of physics, middlebury college, middlebury, vermont 05753 this department welcomes brief communications reporting new demonstrations, laboratory equipment, techniques, or materials of interest to teachers of physics.
This experiment requires familiarity with each of the following. Classroom cosmic ray muon detector users manual 2 chapter 1. Please be a better writer than that and follow them in your report. Electromagnetic interactions deals with the electromagnetic interaction of muon as well as its static properties.
What is the charge speciesaveraged muon lifetime inside scintillator. Updates and tips will be posted on the muon lab web page. Muons can decay due to the mass difference between muons and electrons. Recent uptodate motivations of lepton flavor violation based on supersymmetric. Introduction amount of time, to process the event the cosmic ray detection system is designed to allow the user to accurately observe the rate of incoming charged particles, as well as the approximate decay time of each.
To learn about coincidence methods and electronics used in highenergy physics. The muon and the tau leptons have identical properties to those of the electron except that they are heavier. Muon lifetime measurement school of physics and astronomy. No matter what you call it advanced physics lab, juniorsenior lab, modern lab, optics lab, senior project, or even undergraduate research teachspin apparatus offers your faculty and students a wide array of exciting and challenging handson physics experiments. The first paper to describe the muon s radioactive decay was published in the journal nature in 1940, by a pair of scientists named williams and roberts. University of michigan department of physics 1 measurement of the muon lifetime carl w. Muon experiment physics 431 jan 2007 suggested procedure. Cosmic rays and the muon lifetime1 particle physics, lund. Supplement pdf laser properties lab manual pdf addendum pdf microwave optics lab manual pdf mossbauer effect lab manual pdf muon physics lab manual pdf nuclear magnetic resonance university of washington paper pdf conceptual tour pdf a good overview. Muone sensitivity to new physics explanations of the muon. Also read up on how a photomultiplier tube pmt works. Cosmic ray muons and the muon lifetime crm 3 solid angles are expressed in the dimensionless units of steradian, abbreviated sr. There are some errors in the teachspin discussion of atmospheric physics. Kirbyz physics department, massachusetts institute of technology, cambridge, ma 029.
Most of the references cited are collected either in this manual, the muon lifetime experiment manual mlem, or in the advanced lab particle counting equipment manual pcem. It also possesses a negative charge and a spin of 12. Hertzogprogressinparticleandnuclearphysics84201573123 75 table 1 summaryofmeasuredmuonpropertiesandselecteddecayratesandlimits. In the classroom cosmic ray experiments for most of todays particle physics experiments, large accelerators accelerate particles to very high energies. Coan and ye, teachspin muon physics manual on course website. This requires an assumption on the initial energy and height of the muon upon creation. However, it is possible to do highenergy physics in your school without a particle accelerator.
One of the great mysteries of particle physics is the origin of this mass difference. Conceptual introduction muon physics accessories altimeter. Akerlof september 10, 2009 overview the only fundamental constituents of matter that are important for most of science are electrons, protons, and neutrons. Muon lifetime experiment purpose to detect cosmic ray muons using a setup with three plastic scintillators, and to determine their lifetime. Detailed technical information and a copy of the users manual for muon physics can be found at the website is maintained by professors thomas coan and jingbo ye of. Muon decay in orbit dio muon electron conversion dio spectrum summary 2 al muon decay in orbit muon dio. The validity tests of quantum electrodynamics qed in the simple muonic system such as muonium, muonic hydrogen, and. Measurement of muon lifetime noah scandrette physics and astronomy department, san francisco state university, san francisco, california dated. As a result, muons are produced and approach sea level at speeds close to the speed of light.
Prepared for submission to jhep muone sensitivity to new physics explanations of the muon anomalous magnetic moment p. Muon lifetime experiment purpose introduction physics. Detailed technical information and a copy of the users manual for muon physics can be found at the website is maintained by professors thomas coan and jingbo ye of southern methodist university, with whom teachspin collaborated in developing this exciting. Cosmic ray muon detection gustavus adolphus college. See the tutorial experimental nuclear physics and the chapter fast.