A5039277161- Dark Matter and Cosmic Phenomena
- Particle physics theoretical and experimental studies
- Particle Detector Development and Performance
- Atomic and Subatomic Physics Research
- Particle Accelerators and Free-Electron Lasers
- Particle accelerators and beam dynamics
- Cosmology and Gravitation Theories
- Astrophysics and Cosmic Phenomena
- Superconducting Materials and Applications
- Advancements in PLL and VCO Technologies
- Energy Harvesting in Wireless Networks
- Electrostatic Discharge in Electronics
- Astronomy and Astrophysical Research
- Superconducting and THz Device Technology
- Neutrino Physics Research
- Optical Network Technologies
- Radio Astronomy Observations and Technology
- Biofield Effects and Biophysics
- Wireless Power Transfer Systems
- Advanced Data Storage Technologies
- Radioactive Decay and Measurement Techniques
- Lightning and Electromagnetic Phenomena
- Geophysics and Gravity Measurements
- Advanced Photonic Communication Systems
- Scientific Research and Discoveries
Lawrence Berkeley National Laboratory
2017-2019
European Organization for Nuclear Research
2012-2016
The International Axion Observatory (IAXO) will be a forth generation axion helioscope. As its primary physics goal, IAXO look for axions or axion-like particles (ALPs) originating in the Sun via Primakoff conversion of solar plasma photons. In terms signal-to-noise ratio, about 4–5 orders magnitude more sensitive than CAST, currently most powerful helioscope, reaching sensitivity to axion-photon couplings down few × 10−12 GeV−1 and thus probing large fraction unexplored ALP parameter space....
The CERN Resonant WISP Search (CROWS) probes the existence of Weakly Interacting Sub-eV Particles (WISPs) like axions or hidden sector photons. It is based on principle an optical light shining through wall experiment, adapted to microwaves. Critical aspects experiment are electromagnetic shielding, design and operation low loss cavity resonators detection weak sinusoidal microwave signals. Lower bounds were set coupling constant $g = 4.5 \cdot 10^{-8} $GeV$^{-1}$ for axion particles with a...
In this work, we consider searches for dark matter made of axions or axionlike particles using resonant radio frequency cavities inserted into dipole magnets from particle accelerators, wiggler developed accelerator based advanced light sources, and toroidal similar to those used in particle-physics detectors. We investigate the expected sensitivity such axionlike-particle dark-matter detectors discuss engineering aspects building tuning them. Brief mention is also even stronger field which...
The International Axion Observatory (IAXO) is a proposed 4th-generation axion helioscope with the primary physics research goal to search for solar axions via their Primakoff conversion into photons of 1 – 10 keV energies in strong magnetic field. IAXO will achieve sensitivity axion-photon coupling gaγ down few ×10−12 GeV−1 wide range masses up ∼ 0.25 eV. This an improvement over currently best (3rd generation) helioscope, CERN Solar Telescope (CAST), about 5 orders magnitude signal...
The LHC Schottky beam diagnostic system has the potential to measure parameters such as tune, chromaticity and momentum spread in a non-invasive way. It does so by detecting induced signals at 4.8 GHz, extracting characteristic modulation caused incoherent motion of particles within bunch. was commissioned 2011 provided satisfactory beam-parameter measurements during Run I for lead-ions. However, protons its usability substantially limited due strong interfering common-mode signals. upgraded...
For the microwave equivalent of "light shining through wall" (LSW) experiments, a sensitive detector and very high electromagnetic shielding is required. The screening attenuation between axion generating cavity nearby detection should be greater than 300 dB, in order to improve over presently existing exclusion limits. To achieve these goals practice, "box box" concept was utilized for cavity, while vector signal analyzer used as receiver with narrow resolution bandwidth few micro-Hz. This...
Although they have not yet been detected, axions and axion-like particles (ALPs) continue to maintain the interest (even increasingly so) of rare-event searches community as viable candidates for Dark Matter Universe but also a solution several other puzzles astrophysics. Their property coupling photons has inspired different experimental methods their detection, one which is helioscope technique. The CERN Axion Solar Telescope (CAST) most sensitive built up date recently published part...
The IAXO (International Axion Experiment) is a fourth generation helioscope with sensitivity, in terms of detectable signal counts, at least 104 better than CAST phase-I, resulting sensitivity on gaγ one order magnitude better. To achieve this performance will count 8-coil toroidal magnet 60 cm diameter bores and equipped X-ray focusing optics into 0.20 cm2 spots coupled to ultra-low background Micromegas detectors. be platform that allow solar tracking for 12 hours per day. next short term...
One way to proof or exclude the existence of axion like particles is a microwave light shining through wall experiment. In this publication we will emphasize on engineering aspects such setup, currently under development at CERN. critical point, achieve meaningful results, electromagnetic shielding between axion-emitter and -receiver cavity, which needs be in order 300 dB improve over existing experimental bounds. The RF leakage crosstalk both cavities must well controlled quantified during...
One way to proof or exclude the existence of axion like particles is a microwave light shining through wall experiment. In this publication we will emphasize on engineering aspects such setup, currently under development at CERN. critical point, achieve meaningful results, electromagnetic shielding between axion-emitter and receiver cavity, which needs be in order 300 dB improve over existing experimental bounds. The RF leakage crosstalk both cavities must well controlled quantified during...
To detect or exclude the existence of hidden sector photons axion like particles, a table-top "microwaves shining through wall" experiment has been set up at CERN. An overview experimental layout is given, technical challenges involved are reviewed and measurement procedure including data-evaluation its results to date shown.
We have commissioned the digital Low Level RF (LLRF) system for storage ring at Advanced Light Source Lawrence Berkeley National Lab (LBNL). The is composed of 42 synchronous sampling channels feedback control, diagnostics, and interlocks. closed loop amplitude phase stability measured as < 0.1% 0.1 degree respectively, real-time machine protection interlock latency 2.5 microsecond. also developed PLC-FPGA-EPICS interfaces to support configurations between hybrid operation modes using two...
The ongoing work to upgrade ALS ALS-U demands strict RF requirements such as low jitter and spurs frequency reference meet its accelerator science goals. A phase noise dual Master Oscillator (MO), where the two frequencies are related by a fractional ratio of 608/609 flexible divide four outputs has been consolidated into single chassis. Optical fiber clock distribution system selected over old coax used in distribute these signals various clients across facility, providing high electrical...
"Light Shining Through the Wall" experiments can probe existence of "axion like particles" through their weak coupling to photons. We have adapted such an experiment microwave regime and constructed table top apparatus. This work presents overview experimental setup then focuses on our latest measurement run its results. By operating apparatus within a superconducting MRI magnet, competitive exclusion limits for axion particles first generation optical light shining wall been achieved.