Category: Ra EDM

Farewell Andy & Courtney! (2017 MSU REU Poster Session)

  Andy and Courtney have completed their REUs with the group this summer and presented their results at the REU poster session. Andy developed a machine vision system for characterizing the HV electrodes used for the Ra EDM experiment. This optical method is high resolution (10 microns), high precision (repeatable), real time (can be performed ...

FRIB Day 1 Science Workshop: Fundamental Symmetries

Today I will present a talk with Jon Engel on FRIB Day 1 Science Opportunities for Fundamental Symmetries. This talk is part of a workshop that is a satellite meeting of the 2017 (US) Low Energy (Nuclear Physics) Community Meeting which is being hosted by Physics Division at Argonne National Lab. The main thrust of the talk ...

The Chunk Code: HV Stability During an EDM Simulation

This Weekly Win is a celebration of my high voltage ramp test analysis suite, AKA Chunk Code. Let me break this down into ‘chunks,’ if you will: Here is a plot of a high voltage ramp test the Spinlab RaEDM crew performed on 7-5-2017. The ramp test simulates the conditions that the electrodes will be subjected to during a real permanent EDM experiment. ...

Stable & Repeatable Ramping of 170 kV/cm Electric Field

This week we hit a milestone by successfully running a ramping simulation to 170 kV/cm for ~ 1 hr. This is approximately 15% higher than the goal we set out to reach and more than double the electric field that we were able to achieve during the Ra EDM data run two years ago. Before ...

High Pressure Rinse of High Voltage Electrodes

This weekly win is about removing sub micron-sized particulates in the air we breathe from the Ra EDM electrodes, whose electrical performance can be degraded by the presence of these particulates, with a process called the high pressure rinse. The high pressure rinse is a critical step in decontaminating electrodes that we’ve adopted from accelerator science, where it’s been shown that ...

Fundamental Symmetries of the Early Universe and the Origin of Matter

This week I hosted Prof. Michael Ramsey-Musolf, Director of the Amherst Center for Fundamental Interactions,  who was visiting from UMass.-Amherst to give the MSU P&A Colloquium on “Fundamental Symmetries of the Early Universe and the Origin of Matter.” Abstract: Explaining why the universe contains more matter than antimatter remains an open problem at the interface of particle ...

Laser Trap Monte Carlo Simulation

We have upgraded the Laser Trapping Monte Carlo to include a laser chirping feature.  This new feature allows for the addition of a linear frequency chirp to be added to any of the lasers in the simulation.  This is one of the first needed steps in being able to simulate slowing Radium-225 using its blue ...

HVPlotter in Python

Over the last week, I have developed a program in Python for quickly plotting data made from the exported data from the jhv4 labview program. The program has the user select which file they want to make plots from, and then opens the attached window. The user will then select the x-variable and y-variable they ...

Conditioning of HV Electrodes

This week we successfully approached the point of electrode conditioning with our high voltage system. In previous attempts, we were forced to stop short of reaching a high enough voltage due to cable failure–22 kV was the highest we could get. On Tuesday, we were able to reach 27.9 kV on our 30 kV power supply when our picoammeter ...

Safety Interlock for HV Supply

This week is all about our electrode test station. We’ve made significant safety improvements and improvements in the sensitivity of our high voltage measurements. The first is the installation of our fancy new Interlock Chassis, which allows us to remotely shut down the power supply. It also automatically cuts power to the high voltage power supply in the event that one of ...