J. A. Devlin
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View article: Coherent Spectroscopy with a Single Antiproton Spin
Coherent Spectroscopy with a Single Antiproton Spin Open
Coherent quantum transition spectroscopy is a powerful tool in quantum-sensing and metrology (1), quantum information processing (2), accurate magnetometry (3), high-precision tests of the fundamental laws of nature, and searches for physi…
View article: Proton Transport from the Antimatter Factory of CERN
Proton Transport from the Antimatter Factory of CERN Open
The antiproton is a basic constituent of antimatter and required for stringent matter-antimatter comparisons to test the fundamental charge-parity-time (CPT) reversal invariance in the Standard Model of particle physics (1). Using low ener…
View article: Image-Current Mediated Sympathetic Laser Cooling of a Single Proton in a Penning Trap Down to 170 mK Axial Temperature
Image-Current Mediated Sympathetic Laser Cooling of a Single Proton in a Penning Trap Down to 170 mK Axial Temperature Open
We demonstrate a new temperature record for image-current mediated sympathetic cooling of a single proton in a cryogenic Penning trap by laser-cooled Be+9. An axial mode temperature of 170 mK is reached, which is a 15-fold improvement comp…
View article: Orders of Magnitude Improved Cyclotron-Mode Cooling for Non-Destructive Spin Quantum Transition Spectroscopy with Single Trapped Antiprotons
Orders of Magnitude Improved Cyclotron-Mode Cooling for Non-Destructive Spin Quantum Transition Spectroscopy with Single Trapped Antiprotons Open
We demonstrate efficient sub-thermal cooling of the modified cyclotron mode of a single trapped antiproton and reach particle temperatures $T_+=E_+/k_\text{B}$ below $200\,$mK in preparation times shorter than $500\,$s. This corresponds to…
View article: Onset of Mismatch Repair by the Human Mismatch Repair Protein, MutSbeta for a Biosensing Device
Onset of Mismatch Repair by the Human Mismatch Repair Protein, MutSbeta for a Biosensing Device Open
Deficiency of MutSbeta protein has been proven to be a cause of Lynch Syndrome, which leads to hereditary colorectal cancer. In the absence of MutSbeta, or the energy source to initiate the conformational change of MutSbeta, the DNA repair…
View article: Trap-integrated fluorescence detection with silicon photomultipliers for sympathetic laser cooling in a cryogenic Penning trap
Trap-integrated fluorescence detection with silicon photomultipliers for sympathetic laser cooling in a cryogenic Penning trap Open
We present a fluorescence-detection system for laser-cooled 9Be+ ions based on silicon photomultipliers (SiPMs) operated at 4 K and integrated into our cryogenic 1.9 T multi-Penning-trap system. Our approach enables fluorescence detection …
View article: A 16 Parts per Trillion Comparison of the Antiproton-to-Proton q/m Ratios
A 16 Parts per Trillion Comparison of the Antiproton-to-Proton q/m Ratios Open
The Standard Model (SM) of particle physics is both incredibly successful and glaringly incomplete. Among the questions left open is the striking imbalance of matter and antimatter in the observable universe which inspires experiments to c…
View article: A Proposal for a Low‐Frequency Axion Search in the 1–2 μ$\umu$ eV Range and Below with the BabyIAXO Magnet
A Proposal for a Low‐Frequency Axion Search in the 1–2 μ$\umu$ eV Range and Below with the BabyIAXO Magnet Open
In the near future BabyIAXO will be the most powerful axion helioscope, relying on a custom‐made magnet of two bores of 70 cm diameter and 10 m long, with a total available magnetic volume of more than 7 m 3 . In this document, it proposes…
View article: Image-current mediated sympathetic laser cooling of a single proton in a Penning trap down to 170 mK axial temperature
Image-current mediated sympathetic laser cooling of a single proton in a Penning trap down to 170 mK axial temperature Open
We demonstrate a new temperature record for image-current mediated sympathetic cooling of a single proton in a cryogenic Penning trap by laser-cooled $^9$Be$^+$. An axial mode temperature of 170 mK is reached, which is a 15-fold improvemen…
View article: Ultra-thin polymer foil cryogenic window for antiproton deceleration and storage
Ultra-thin polymer foil cryogenic window for antiproton deceleration and storage Open
We present the design and characterization of a cryogenic window based on an ultra-thin aluminized biaxially oriented polyethylene terephthalate foil at T < 10 K, which can withstand a pressure difference larger than 1 bar at a leak rat…
View article: Trap-integrated fluorescence detection based on silicon photomultipliers in a cryogenic Penning trap
Trap-integrated fluorescence detection based on silicon photomultipliers in a cryogenic Penning trap Open
We present a fluorescence-detection system for laser-cooled 9Be+ ions based on silicon photomultipliers (SiPM) operated at 4 K and integrated into our cryogenic 1.9 T multi-Penning-trap system. Our approach enables fluorescence detection i…
View article: A proposal for a low-frequency axion search in the 1-2 $μ$eV range and below with the BabyIAXO magnet
A proposal for a low-frequency axion search in the 1-2 $μ$eV range and below with the BabyIAXO magnet Open
In the near future BabyIAXO will be the most powerful axion helioscope, relying on a custom-made magnet of two bores of 70 cm diameter and 10 m long, with a total available magnetic volume of more than 7 m$^3$. In this document, we propose…
View article: BASE-STEP: A transportable antiproton reservoir for fundamental interaction studies
BASE-STEP: A transportable antiproton reservoir for fundamental interaction studies Open
Currently, the only worldwide source of low-energy antiprotons is the AD/ELENA facility located at CERN. To date, all precision measurements on single antiprotons have been conducted at this facility and provide stringent tests of the fund…
View article: Testing CPT Invariance by High-Precision Comparisons of Fundamental Properties of Protons and Antiprotons at BASE
Testing CPT Invariance by High-Precision Comparisons of Fundamental Properties of Protons and Antiprotons at BASE Open
The BASE collaboration at the Antiproton Decelerator facility of CERN compares the fundamental properties of protons and antiprotons using advanced Penning-trap systems. In previous measurement campaigns, we measured the magnetic moments o…
View article: Computational Investigation of Chirality-Based Separation of Carbon Nanotubes Using Tripeptide Library
Computational Investigation of Chirality-Based Separation of Carbon Nanotubes Using Tripeptide Library Open
Carbon nanotubes (CNT) have fascinating applications in flexible electronics, biosensors, and energy storage devices, and are classified as metallic or semiconducting based on their chirality. Semiconducting CNTs have been teased as a new …
View article: Ultra-thin polymer foil cryogenic window for antiproton deceleration and storage
Ultra-thin polymer foil cryogenic window for antiproton deceleration and storage Open
We present the design and characterization of a cryogenic window based on an ultra-thin aluminized biaxially oriented polyethylene terephthalate foil at T < 10 K, which can withstand a pressure difference larger than 1 bar at a leak rate <…
View article: A high-Q superconducting toroidal medium frequency detection system with a capacitively adjustable frequency range &gt;180 kHz
A high-Q superconducting toroidal medium frequency detection system with a capacitively adjustable frequency range >180 kHz Open
We describe a newly developed polytetrafluoroethylene/copper capacitor driven by a cryogenic piezoelectric slip-stick stage and demonstrate with the chosen layout cryogenic capacitance tuning of ≈60 pF at ≈10 pF background capacitance. Con…
View article: Sympathetic cooling schemes for separately trapped ions coupled via image currents
Sympathetic cooling schemes for separately trapped ions coupled via image currents Open
Cooling of particles to mK-temperatures is essential for a variety of experiments with trapped charged particles. However, many species of interest lack suitable electronic transitions for direct laser cooling. We study theoretically the r…
View article: LC circuit mediated sympathetic cooling of a proton via image currents
LC circuit mediated sympathetic cooling of a proton via image currents Open
Efficient cooling of trapped charged particles is essential in many fundamental physics experiments, for high-precision metrology, and for quantum technology. Until now, ion-ion coupling for sympathetic cooling or quantum state control has…
View article: Technical Design Report of BASE-STEP
Technical Design Report of BASE-STEP Open
BASE-STEP is a transportable antiproton trap system with the purpose to improve tests of CPT invariance based on antiproton precision measurements. The magnetic field fluctuations in the AD/ELENA facility impose a major limitation in upcom…
View article: Constraints on the Coupling between Axionlike Dark Matter and Photons Using an Antiproton Superconducting Tuned Detection Circuit in a Cryogenic Penning Trap
Constraints on the Coupling between Axionlike Dark Matter and Photons Using an Antiproton Superconducting Tuned Detection Circuit in a Cryogenic Penning Trap Open
We constrain the coupling between axionlike particles (ALPs) and photons, measured with the superconducting resonant detection circuit of a cryogenic Penning trap. By searching the noise spectrum of our fixed-frequency resonant circuit for…
View article: Diagram and illustrations of parts of the BASE experiment
Diagram and illustrations of parts of the BASE experiment Open
A number of illustrations of the parts of the BASE experiment, located in CERN's antimatter decelerator (AD).
View article: Sympathetic cooling of a trapped proton mediated by an LC circuit
Sympathetic cooling of a trapped proton mediated by an LC circuit Open
Efficient cooling of trapped charged particles is essential to many fundamental physics experiments1,2, to high-precision metrology3,4 and to quantum technology5,6. Until now, sympathetic cooling has required close-range Coulomb interactio…
View article: New techniques for a measurement of the electron's electric dipole moment
New techniques for a measurement of the electron's electric dipole moment Open
Data for the paper published at https://doi.org/10.1088/1367-2630/ab83d2
View article: Superconducting Solenoid System with Adjustable Shielding Factor for Precision Measurements of the Properties of the Antiproton
Superconducting Solenoid System with Adjustable Shielding Factor for Precision Measurements of the Properties of the Antiproton Open
A superconducting self-shielding three-solenoid system with an adjustable shielding factor is developed, implemented, and characterized using a single antiproton in a Penning trap. With the tuned system, we suppress external magnetic field…
View article: Deep Laser Cooling and Efficient Magnetic Compression of Molecules
Deep Laser Cooling and Efficient Magnetic Compression of Molecules Open
We introduce a scheme for deep laser cooling of molecules based on robust dark states at zero velocity. By simulating this scheme, we show it to be a widely applicable method that can reach the recoil limit or below. We demonstrate and cha…
View article: Data presented in "Deep laser cooling and efficient magnetic compression of molecules"
Data presented in "Deep laser cooling and efficient magnetic compression of molecules" Open
Experimental data presented in our paper "Deep laser cooling and efficient magnetic compression of molecules"