Recent Progress on WireCell Xin Qian and Chao

Recent Progress on Wire-Cell Xin Qian and Chao Zhang BNL 1

Wire-Cell Reconstruction • Reconstruction: – TPC Signal Processing • In a good shape, to be validated with real data – 3 D event imaging with both time and charge • In a good shape, speed can be improved – Pattern recognition with 3 D points • Initial development is promising – Physics (PID, kinematics …) • To be worked out • Software: – Wire-Cell prototype code • Maintained by Xin • Main reconstruction alg. Exists • Poorly written – Wire-Cell production code • Maintained by Brett • Catching up with prototype – Bee 3 D event display • Maintained by Chao – Wire-Cell/Lar. Soft Interface • Tingjun/Chao http: //www. phy. bnl. gov/wire-cell/ 2

Highlight of Recent Reconstruction Progress in Wire-Cell • “Non-parallel” track reconstruction • “Parallel” track reconstruction • “Shower” reconstruction • Micro. Boo. NE-related – Cosmic identification – Neutrino identification 3

What’s the challenge of Tracking/Clustering? • Operations are all at “low-level” i. e. Hough transformation, Crawler, Vertex fitting/merging … • Too many different topologies many corner cases • There is no silver bullet, and has to accumulate experience gradually and patiently 4

Track Reconstruction • Three categories: – Tracks not parallel to wire-plane (Done) – Red: Vertices – Magenta: tracks 5

Track Reconstruction • Three categories: – Tracks not parallel to wire-plane (Done) – Tracks parallel to the wire-plane (Done) 6

More on tracks Magenta: regular tracks or parallel tracks Red: bad tracks Blue: short tracks 7

Progress on Shower Reconstruction • Identification of shower – Single shower like – Shower + tracks • Also – Primary vertex – Initial track 8

Another Shower 9

Another Shower 10

Cosmic Identification • Stitch small tracks together 11

Neutrino Identification • With TPC information only, actually a stopped muon with wrong timing …? 12

Recent Progress on Lar. Soft Integration • Tingjun implemented a new Lar. Soft module to take Wire. Cell 3 D output (space points with wire hits associations) and write as space points and hits, so that the existing reconstruction alg. can try on Wire-Cell output (3 D images) – Will reported separately at some points trackkalmanhit 13

Next Steps and Future Plan • Need to be ready for the Micro. Boo. NE beam data (neutrino selection, and de-ghosting) • TPC Orientation optimization technote • Wrapped Wire and multiple TPCs (Xiaoyue) – Ready for 35 ton data • Go beyond a single (connected) object Important for shower • Fine Tracking (PID, energy, kinematics …) • Refine Pattern Recognition … • Wire-Cell rewrite and better definition of data products 14

Introduction to BEE http: //www. phy. bnl. gov/wire-cell/bee/ • BEE is a web-based application for interactive display of LAr. TPC events – No setup – Cross-platform – For LAr. TPC : Tomographic mode, projections, multiple geometries, . . . – For developers : User uploads, multiple algorithms, MC truth, customizable overlay, . . . – For public : Explore the large preset samples of different neutrino interactions in LAr. TPC! 15

http: //www. phy. bnl. gov/wire-cell/bee/set/8/event/99/ 16

How to Use BEE • Just start to use it • Some documentations can be found at http: //bnlif. github. io/wire-cell-docs/viz/bee/ • Requirements – A modern web browser that supports Web. GL (http: //caniuse. com/#feat=webgl). We recommend Google Chrome for best experience. – An internet connection. – A relatively good graphic card. A discrete GPU greatly enhances the performance. 17

How to View Your Own Results • Documentation about user uploads can be found at http: //bnlif. github. io/wire-cell-docs/viz/uploads/ • For LAr. Soft users, follow http: //bnlif. github. io/wire-cell-docs/viz/uploads/#convertlarsoft-output-to-bee bee_upload. zip 18

Memorize the following hotkeys for efficient navigation in BEE! 19