1 / 10

Hall C Safety Stand down March 20, 2009

Hall C Safety Stand down March 20, 2009. E05-115 HES/HKS. Stephen Wood: Overview and Safety Overview Mike Spata : Beamline overview Kellner : Schedule and safety rules Manzlak : Physics Division EH&S comments Neil Wilson: Tool Safety Bill Vulcan: Electrical work.

grant-good
Download Presentation

Hall C Safety Stand down March 20, 2009

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Hall C Safety Stand downMarch 20, 2009 E05-115 HES/HKS • Stephen Wood: Overview and Safety Overview • Mike Spata: Beamline overview • Kellner: Schedule and safety rules • Manzlak: Physics Division EH&S comments • Neil Wilson: Tool Safety • Bill Vulcan: Electrical work

  2. Building blocks of ordinary matter Protons Neutrons u u d u d d Quarks

  3. Chart of Isotopes Black squares: Stable or nearly stable Exploiting “Chart”: Medical isotopes Nuclear Power Exploring and extending “Chart” still an active field: Astrophysics FRIB @ MSU Protons Neutrons

  4. Exploring a third dimension Protons Neutrons u d d u u d Quarks Lambda Particle (a hyperon) u d s Strange quark e + p  e + K+ +  Producing Lambdas

  5. Extend building blocks of the World from u,d to u,d,s! Nu ~ Nd~ Ns LL, Xhypernuclei L, Shypernuclei Z N World of u, d, squarks Number of s quarks 2 Proton# Normal Nuclei (World of u,d quarks) 1 Nutron # Neutron# 0

  6. Hypernuclearproductionby the (e,e’K+) reaction (E05-115) K+ detection At very forward angle (~ 0 deg.) Detected by High resolution Kaon Spectrometer (HKS) L is free from nucleons’ Pauli exclusion Probe to deep inside of nucleus Target nucleus K+ L is L in deep inside of nucleus? or should be treated as (uds)? Eg Extend nuclear force to baryon force e-Beamfrom CEBAF e’ e’ detection Should be at extremely forward angles Detected by High resolution Electron Spectrometer (HES)

  7. Evolution of 12LB spectra E89-009 ~300h x 0.6mA E01-011 ~120h x 30mA E05-115 ~24h x 30mA counts/ 100keV Counts/150 keV Simulation Accidental coincidence -BL (MeV) -BL [MeV] Year 2009 summer! Year 2005 Year 2000 Much sharper spectra than possible with pion or kaon beams

  8. Hypernuclear investigation in wide mass range at JLab Hall C Elementary Process 1st gen.: E89-009 12C 1 20 50 200 1057 A 2nd gen.: E01-011 7Li 12C 28Si Neutron/Hyperon star, Strangeness matter E05-1156,7Li 10,11B 12C (40Ca) 52Cr 89Y Light Hypernuclei (s,p shell) Baryon-baryon interaction in SU(3) LS coupling in large isospin hypernuclei Cluster structure, Fine structure Neutron rich hypernuclei Medium - Heavy hypernuclei Single-particle potential Distinguishability of a L hyperon U0(r), mL*(r), VLNN, ... 3rd Generation Experiment

  9. HKS + HES + New Splitter (dedicated system to hypernuclear study) Fully optimized for (e,e’K+) hypernuclear spectroscopy HES e- To the beam dump 7.5deg tilt HKS K+ Target 2.344 GeV CEBAF Electron beam

  10. One beam in – 4 “beams” out Kaon and electron need to be detected at small scattering angles. Splitter magnet separates negative electron and positive kaon. Splitter magnet also bends primary beam. Beam needs to be send to dump. Either bend beam after splitter (the way it was done last time, or bring beam in at an angle. e- Electrons Photons K+ 10

More Related