Cascade and Flasher Workshop Welcome! n Logistics n Agenda n Goals Spencer Klein, LBNL

Logistics n Talks Monday and Tuesday mornings u Otherwise: Work Time F Small groups and individuals u Progress Reports Wed. morning and closeout Wed. afternoon. n Monday, Tuesday in Perseverance Hall n Wednesday in Bldg. 2, Room 100B n Separate ‘breakout’ room available in afternoons n Wireless in all conference rooms u Some ethernet available. Ask for a cable if you need one

Talks on the web n I will put all of the talks on the web n Please me your talks!

Talks n Monday: u ???: A users guide to the flashers” Mark Krasberg u “Flashers, Brightness Calibrations and Module Orientation” Chris Wendt u “Flasher Analysis with AMANDA” Kurt Woschnagg u “How to simulate cascades and flashers” Tom McCauley u “Characteristics of Flasher data” (Sourav Mandal) n Tuesday u “Flashers and Hole Ice” (Doug Rutledge) u “Analyzing flasher events with Renew” (Tom McCauley) u “Waveform based reconstruction” (Sean Grullon) u “String 21 flashers in AMANDA" Dave Hardtke u “Flasher reconstruction” (Dima Chirkin) u TBC: “Characteristics of Cascade Simulations” Spencer Klein

Goals n Goals: Push forward with cascade and flasher analysis u Produce Flasher verification plots F What are the most appropriate plots? Ice properties, timing, geometry, … u Simulate Cascades and Flashers F Find problems in simulations E.g. 1.pe. Pulses in simulation are ~ 2-3X larger than in data u Develop cascade algorithms using flasher (& simulation) data

Flasher Verification n What can the flashers tell us about how well IceCube is working? n What can the flashers tell us about ice quality? u We are ~ 300 m from AMANDA – is the ice any different? n What can the flashers tell us about hole ice? n Do we need additional runs with different configurations? u Not all LEDs? u AMANDA lasers

Flashers - Specific Tasks n Understand Flasher characteristics (nhits,…) n Systematic Timing verification (new flasher data) u Simulation for comparison data u Solve for individual resolution n Geometry verification (LLH reconstruction) u Location of DOM 60? u Start on inter-string geometry calibrations n Energy/Brightness calibrations n Ice properties n Hole Ice (probably not) n Orientation effects n Photonics for flashers? n Comparison of flasher data and cascade simulations n AMANDA looking at IceCube flashers

Cascade and Flasher simulation n IceTray simulations may finally be ready for physics use u Input/output & calibrations working u Photonics tables n Generate events and look at them n Compare flasher data and flasher simulations

Cascade Algorithm Development & Testing n Many different cascade algorithms, in different stages of development n What are similarities vs. differences? n What are appropriate metrics for comparing algorithms & how should they be weighted? u Vertex & energy reconstruction accuracy u Background rejection u Speed & robustness (for use at pole) n Can we make more progress by working together? u Common framework u Common simulations