Designed a vertexing algorithm for the future HGC (High-granularity calorimeter) using only spatial and timing information to reconstruct interaction vertex locations to sub-millimeter precision, and applied this to Higgs to di-photon events.

HGCal simulation analyses for CMS - Sarah Marie Bruno

Compared the performance of the current ECAL (Electromagnetic calorimeter) and the future HGC for the Higgs to di-photon channel. Also worked at the CERN test beam with a prototype Shashlik detector.

Used neutral pion events to study ECAL crystal timing response and transparency in 2015 data, including the relationship between the two variables.

Worked at the CERN test beam with a prototype Shashlik detector, and measured the timing resolution and rising edge properties of pulses from a Hamamatsu MCP-PMT (micro-channel plate photomultiplier tube).

Worked at the FNAL test beam with Hamamatsu SiPMs (silicon-based photomultipliers), measured timing resolution with a picosecond-pulsed laser.

Direct tests of a pixelated microchannel plate as the active element of a shower maximum detector - Federico Presutti

Worked at the FNAL test beam to investigate use of Photek/Photonis MCPs in an electromagnetic shower maximum detector.

Trained neural networks for track reconstruction using PyBrain and Theanets libraries.

Trained neural networks to make razor trigger decisions, with focus on fast, hardware- compatible implementations.

Implemented a principle component analysis using data transfer information from the CMS PhEDEx (Physics Experiment Data Export) tool.

Investigated use of SOMs (self-organizing map) for outlier detection in razor searches, and NADEs (Neural autoregressive density estimator) for pseudo-data production.

Investigated use of GPU-based convolution neural networks for a quark-gluon jet discriminator.

Measured jet transverse momentum resolution and bias in pointing reconstruction, hadronic razor trigger efficiency, and electron/muon reconstruction efficiencies in 8 TeV data and 13 TeV Monte Carlo samples for the razor analysis.

Final Reports:

Test Beams and Timing

Time-based vertex reconstruction in CMS - Ben Bartlett

Designed a vertexing algorithm for the future HGC (High-granularity calorimeter) using only spatial and timing information to reconstruct interaction vertex locations to sub-millimeter precision, and applied this to Higgs to di-photon events.

HGCal simulation analyses for CMS - Sarah Marie Bruno

Compared the performance of the current ECAL (Electromagnetic calorimeter) and the future HGC for the Higgs to di-photon channel. Also worked at the CERN test beam with a prototype Shashlik detector.

Study of ECAL timing effects due to transparency using Pi0 decays from CMS - Kai Chang

Precision timing analysis of July 2015 test beam data - Mohammad Hassan Hassanhashahi

Worked at the CERN test beam with a prototype Shashlik detector, and measured the timing resolution and properties of the rising edge of pulses from a Hamamatsu MCP-PMT.

Timing resolution studies of Hamamatsu silicon photomultipliers - Eric Liu

Direct tests of a pixelated Microchannel Plate as the active element of a shower maximum detector - Federico Presutti

Machine Learning

Tracking by Neural Nets - Arash Jofrehei

Machine learning techniques for razor triggers - Marina Kolosova

Machine learning for fast data transfers - Nikhil Krishnan

Optimizing SUSY searches at CMS using machine learning techniques - Yuting Li

Convolutional neural network - Sahand Seifnashri

13 TeV Razor Analysis

Developing a search for dark matter direct production using razor variables at 13 TeV - Jared Filseth

Measured jet transverse momentum resolution and bias in pointing reconstruction, hadronic razor trigger efficiency, and electron/muon reconstruction efficiencies in 8 TeV data and 13 TeV Monte Carlo samples for the razor analysis.

CMS introduction course (July 8th - 10th) :

https://espace.cern.ch/info-safetytraining-official/FAQ/Pages/default.aspx

Basic Saftey Rules and Regulations :

https://indico.cern.ch/event/323868/contribution/5/material/slides/0.pdf

Tutorial for the pi0 calibration code :

https://twiki.hep.caltech.edu/pub/Main/Summer2015/15_03_03_EcalproTutorial.pdf

CMS Registration :

http://cms.cern.ch/iCMS/jsp/secr/reg/reg.jsp

CMS introduction course (July 8th - 10th) :

https://indico.cern.ch/event/402576/

Javiers tutorials :

Install ROOT on your laptop :

https://docs.google.com/document/d/1ss5EbpSYidwja7AHelUwNc3VRPqAjJ6cJ3jvDSl1244/edit?usp=sharing

RazorAnalyzer SURF Tutorial :

https://www.dropbox.com/sh/c10nl44gxvmfscp/AADmAUvFzcHtBWv1UlPJiI2ca?dl=0

CERN Timing Test Beam July 1st to 7th :

https://twiki.cern.ch/twiki/bin/viewauth/CMS/CMSFastTimingTestBeamSPSH2-Jul,2015

Caltech timing twiki :

https://twiki.hep.caltech.edu/twiki/bin/view/Main/Phase2Upgrade

CERN summer student lectures (June 30th - August 3rd) :

http://summer-timetable.web.cern.ch/summer-timetable/

CERN Users Office :

http://usersoffice.web.cern.ch/

CMS Secretariat :

https://twiki.cern.ch/twiki/bin/view/CMSPublic/DrupalContactCMS

twikis from previous years :

https://twiki.cern.ch/twiki/bin/view/CMS/CaltechSummerStudents (2010 and 2009)

Caltech CMS Summer Students 2015

https://twiki.hep.caltech.edu/twiki/bin/view/Main/Summer2011

https://twiki.hep.caltech.edu/twiki/bin/view/Main/Summer2012

https://twiki.hep.caltech.edu/twiki/bin/view/Main/Summer2013