Assembling, Cleaning, and testing of a unique open-ended cylindrical Penning trap K. S. Marble1,2 , P. Shidling2, and D. Melconian2 1Tarleton State University, Stephenville, TX 76402 2Cyclotron Institute, Texas A&M University, College Station, TX 77843 DE-FG03-93ER40773 PHY-1263281

Abstract Motivation Cleaning and Assembling

A new experimental beamline containing a prototype cylindrical penning trap What is a Penning trap? has recently been constructed at the Cyclotron Institute at Texas A&M q It is an ion trap which uses: University. The new beamline will enable precision experiments that enhance 1. An electric field for axial our understanding of the limits on non-SM processes in the weak interaction confinement. through the measurement of the �−� correlation parameter for T = 2, 0+→0+ 2. A magnetic field for radial supper allowed β-delayed proton emitters. The prototype TAMUTRAP consists confinement of an open-ended cylindrical penning trap of diameter of 90 mm with gold- plated electrodes of oxygen free high conductivity copper to prevent oxidation. Why use a Penning Trap? M. S. Rahaman, Ph.D. thesis, University of Heidelberg, 2005. The trap’s electric quadrupole field is provided by a SHIP TRAPS RF q Enhance our understanding of the limits on non-SM processes in the This Prototype Penning Trap is a 7 Electrode trap: electronic circuit to the four segmented electrodes at the center of the trap weak interaction q Two end caps, two end electrodes, two compensation electrodes, and a while the trap’s 7 Tesla magnetic field is provided by an Agilent 210 mm ASR q By measuring the β-ν correlation parameter for T = 2, 0+→0+ supper four-fold segmented ring electrode magnet. allowed β-delayed proton emitters q Fabricated using oxygen-free high conductivity copper q The parameter is determined by observing the proton energy q Gold-plated to avoid oxidation distribution q Segmented using aluminum oxide (Al2O3) q Capable of performing a wide range of other possible experiments such q With a diameter of 90 mm (currently the largest penning trap) as mass spectroscopy. Constructing and Aligning the Beamline Sliding in and Testing the Trap Current Status

The output This beamline was from the MCP. constructed with a variety of elements : q A surface ion source The output from q two Faraday cups the pulsing drift (before and after the tube. magnet) q Einzel lenses q two bellows The voltage vs time graph while q a deflector The radial magnetic field is The Microchannel Plate was The voltage vs time graph while q two x-y steerers applied to the center of the connected to NIM electronics the ion beam was off and the drift the ion beam was on and the drift tube was pulsing. qand two MCP penning trap using an Agilent and the output of the signal tube was pulsing. detectors (before and 7T 210 mm ASR. was viewed on the In conclusion: after the magnet). Oscilloscope. ü The prototype trap was cleaned and assembled ü A beamline was constructed and aligned using a optical transit. Testing the trap: ü The intensity of the beam was optimized. All elements were q A continuous ion beam was provided using a surface ion source ü The ion beam was successfully bunched using the pulsing drift tube aligned using an q Faraday cups were placed before and after the magnet to ensure that and adjusting the voltage on the ejection end cap. optical transit and two the beam passed through the trap targets located in front q Einzel lenses and x-y steerers were used to align the beam of and behind the q Once the beam intensity was determined using the Faraday cups a Future Work magnet. MCP detector (positioned after the magnet) was used to analyze the signal coming from the beam on an oscilloscope. To maintain a high q Each of the Electrodes were grounded except for the trapping drift -7 q Mass Spectroscopy will be used to demonstrate the prototype traps vacuum (10 mbar to tube -9 trapping ability. 10 mbar) copper q To bunch the ion beam the trapping drift tube was pulsed using a q Adjustments to the design of the final penning trap will be made based gaskets were used as filter circuit upon performance testing results. well as turbo pumps q After bunching the ion source and the ejection end cap was q Assembly and testing of the final TAMUTRAP. with backing roughing grounded q The Final TAMUTRAP will be connected to the K150 cyclotron. pumps. q The bunched signal was then observed using an oscilloscope q The voltages across both of the end caps were adjusted.