Fermilab Experience Joshua Louis. Introduction  The goals of Fermilab's TRAC program:  To provide outstanding science, mathematics, computer science,

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Presentation transcript:

Fermilab Experience Joshua Louis

Introduction  The goals of Fermilab's TRAC program:  To provide outstanding science, mathematics, computer science, and technology teachers with professional scientific, engineering, or technical experiences through summer research opportunities.  Increased awareness and understanding of cutting-edge science and technology obtained by the teacher can be transferred back to the classroom.

My Assignment  Particle Physics Division  Neutrino Department

Liquid Argon R&D  What is being developed?  Liquid Argon Purity Demonstrator (LAPD)  Liquid Argon purity must be demonstrated before neutrino research begins

Liquid Argon Purity Demonstrator  Goals of LAPD  The primary goal of the LAPD is to test if required electron drift-lifetimes for a Time Projection Camber (TPC) can be achieved without evacuation in an empty vessel  An additional goal of LAPD is to understand how to scale the cryogenics system to a multi-kiloton detector.

Liquid Argon Purity Demonstrator  Achieving Purity allows electrons to drift!  Purity is defined as:  30 ppt equivalent oxygen contamination  Why do we need this degree of purity?  Other molecules such as 0 2 & H 2 O interfere with drift  Without purity no neutrinos can be detected

Liquid Argon Purity Demonstrator  If the correct level of purity exists this is what you should see:  The observed tracks are a result of neutrinos indirect interactions with liquid argon electrons  Length, spin, & intensity all guide scientists to different particles

LAr TPC Operation 8Nov. 1, 2010 Need extremely good LAr purity, low convective flow

My Contributions  Three Primary Roles  Cryogenic Temperature Expansion Testing  Trigger Counter Characterization  Cryogenic Temperature Resistor Testing  Secondary Role  Student of all things Fermilab

Cryogenic Temperature Expansion (CTE)  Identify an Epoxy which could withstand liquid nitrogen/argon temperatures and not be compromised  Early testing revealed cracks in the epoxy which held copper wire to various components

Cryogenic Temperature Expansion (CTE)  This work included:  Wrapping the g-10 board in wire

Cryogenic Temperature Expansion (CTE)  This work included:  Wrapping the g-10 board in wire  Mixing and applying several different epoxies to the g-10 board

Cryogenic Temperature Expansion (CTE)  This work included:  Wrapping the g-10 board in wire  Mixing and applying several different epoxies to the g-10 board  Testing the thermal expansion of epoxy samples

Cryogenic Temperature Expansion (CTE)  Results  Stycast 2850 closely aligns with thermal expansion of G-10  Additional cryogenic epoxies have been recommend for further study 3M Grey3M AmberStycast 2850G10 Length (mm) Thermal Expansion (mm) Calculated Expansion (∆L/L) 4.56e e e-51.45e-5

Trigger Counter Characterization  Get rid of any light leaks which lead to interference with main signal, catalog characteristics, and label counters  This requires a great deal of electrical tape and patience  Each counter takes at least 3 hours to produce a complete signal

Trigger Counter Characterization  Learning the complexities of the oscilloscope  18 trigger counters were processed

Trigger Counter Characterization  What are trigger counters used for?  In order to trigger scan and provide the third dimension (time) Beam

Cryogenic Resistor Testing  Measure the change in resistance when introduced into a cryogenic environment  240 Resistors where soldered onto a semi-conductive platform

Cryogenic Resistor Testing  Each resistor was measured to ensure acceptable changes in resistance and component resilience  Wire harnesses were created in order to provide a reasonable testing format

Cryogenic Resistor Testing  Preliminary Results ResistorRoom TemperatureLiquid Nitrogen - Trail 1Room Temperature2Liquid Nitrogen - Trail 2Room Temperature Avg Standard Deviation Min Max * Measured in GOHM15 min soak1 hour warm-up30 min soak30 min warm up

Cryogenic Resistor Testing

Program Take Away  I can share with my students the excitement that comes from scientific research  I will strive to model curriculum in a way that accurately reflects the process of scientific innovation as observed at Fermilab  I am now familiar with cutting-edge technologies and scientific endeavors  I have made connections within my community that will allow my students to see what pursuing a career in science and technology could look like  I have been affirmed in my calling to be a professional educator

Thank You  Harry Cheung & Bjoern Penning – Program Coordinators  Stephen Pordes & Hans Jostlein – Immediate Supervisors  The amazing technicians, engineers, and physicists at PAB  The staff at lab 6

And to the Jefferson community for supporting me on my journey

Neutrino?

 Neutrino Video 