A5001250533- CCD and CMOS Imaging Sensors
- Particle Detector Development and Performance
- Dark Matter and Cosmic Phenomena
- Astrophysics and Cosmic Phenomena
- Infrared Target Detection Methodologies
- Astronomy and Astrophysical Research
- Neutrino Physics Research
- Calibration and Measurement Techniques
- Radiation Detection and Scintillator Technologies
- Atomic and Subatomic Physics Research
- Particle physics theoretical and experimental studies
- Adaptive optics and wavefront sensing
- Advanced Vision and Imaging
- Stellar, planetary, and galactic studies
- Gamma-ray bursts and supernovae
- Pulsars and Gravitational Waves Research
- Nuclear Physics and Applications
- Advanced Optical Sensing Technologies
- Particle Accelerators and Free-Electron Lasers
- Analytical Chemistry and Sensors
- Galaxies: Formation, Evolution, Phenomena
- Solar and Space Plasma Dynamics
Fermi National Accelerator Laboratory
2008-2025
Los Alamos National Laboratory
2019
The Dark Energy Camera is a new imager with 22 diameter field of view mounted at the prime focus Victor M. Blanco 4 m telescope on Cerro Tololo near La Serena, Chile. camera was designed and constructed by Survey Collaboration meets or exceeds stringent requirements for wide-field supernova surveys which collaboration uses it. consists five-element optical corrector, seven filters, shutter 60 cm aperture, charge-coupled device (CCD) focal plane 250 μm thick fully depleted CCDs cooled inside...
The Coherent Neutrino-Nucleus Interaction Experiment (CONNIE) uses low-noise fully depleted charge-coupled devices (CCDs) with the goal of measuring low-energy recoils from coherent elastic scattering ($\mathrm{CE}\ensuremath{\nu}\mathrm{NS}$) reactor antineutrinos silicon nuclei and testing nonstandard neutrino interactions (NSI). We report here first results detector array deployed in 2016, considering an active mass 47.6 g (eight CCDs), which is operating at a distance 30 m core Angra 2...
A bstract The Coherent Neutrino-Nucleus Interaction Experiment (CONNIE) is taking data at the Angra 2 nuclear reactor with aim of detecting coherent elastic scattering antineutrinos silicon nuclei using charge-coupled devices (CCDs). In 2019 experiment operated a hardware binning applied to readout stage, leading lower levels noise and improving detection threshold down 50 eV. results analysis are reported here, corresponding detector array 8 CCDs fiducial mass 36.2 g total exposure 2.2...
Millicharged particles, proposed by various extensions of the standard model, can be created in pairs high-energy photons within nuclear reactors and interact electromagnetically with electrons matter. Recently, existence a plasmon peak interaction cross section silicon eV range was highlighted as promising approach to enhance low-energy sensitivities. The CONNIE Atucha-II reactor neutrino experiments utilize Skipper-CCD sensors, which enable detection interactions range. We present...
The CONNIE detector prototype is operating at a distance of 30 m from the core 3.8 GW$_{\rm th}$ nuclear reactor with goal establishing Charge-Coupled Devices (CCD) as new technology for detection coherent elastic neutrino-nucleus scattering. We report on results engineering run an active mass 4 g silicon. CCD array described, and performance observed during first year discussed. A compact passive shield was deployed detector, producing order magnitude reduction in background rate. remaining...
The CONNIE experiment uses fully depleted, high resistivity CCDs as particle detectors in an attempt to measure for the first time Coherent Neutrino-Nucleus Elastic Scattering of antineutrinos from a nuclear reactor with silicon nuclei. This talk, given at XV Mexican Workshop on Particles and Fields (MWPF), discussed potential perform this measurement, installation progress Angra dos Reis power plant, well plans future upgrades.
The Dark Energy Survey Collaboration has completed construction of the Camera (DECam), a 3 square degree, 570 Megapixel CCD camera which will be mounted on Blanco 4-meter telescope at CTIO. DECam used to perform 5000 sq. deg. with 30% time over 5 year period. During remainder time, and after survey, available as community instrument. All components have been shipped Chile post-shipping checkout finished in Jan. 2012. Installation is progress. A summary lessons learned an update performance...
We describe the Dark Energy Camera (DECam), which will be primary instrument used in Survey. DECam a 3 sq. deg. mosaic camera mounted at prime focus of Blanco 4m telescope Cerro-Tololo International Observatory (CTIO). includes large CCD focal plane, five element optical corrector, filters (g,r,i,z,Y), and associated infrastructure for operation cage. The plane consists 62 2K x 4K modules (0.27"/pixel) arranged hexagon inscribed within roughly 2.2 degree diameter field view. CCDs 250 micron...
The Dark Energy Camera is an wide field imager currently under construction for the Survey. This instrument will use fully depleted 250 μm thick CCD detectors selected their higher quantum efficiency in near infrared with respect to thinner devices. were developed by LBNL using high resistivity Si substrate. full set of scientific needed DECam has now been fabricated, packaged and tested. We present here results testing characterization these devices compare technical requirements
DECam is a 520 Mpix, 3 square-deg FOV imager being built for the Blanco 4m Telescope at CTIO. This facility instrument will be used "Dark Energy Survey" of southern galactic cap. has chosen 250 μm thick CCDs, developed LBNL, with good QE in near IR focal plane. In this work we present characterization these detectors done by DES team, and compare it to technical requirements. The results demonstrate that satisfy needs instrument.
The Dark Energy Survey Collaboration is building the Camera (DECam), a 3 square degree, 520 Megapixel CCD camera which will be mounted on Blanco 4-meter telescope at CTIO. DECam used to perform 5000 sq. deg. with 30% of time over 5 year period. During remainder time, and after survey, available as community instrument. Construction well underway. Integration testing major system components has already begun Fermilab collaborating institutions.
The Dark Energy Camera (DECam) is the new wide field prime-focus imager for Blanco 4m telescope at CTIO. This instrument a 3 sq. deg. camera with 45 cm diameter focal plane consisting of 62 2k × 4k CCDs and 12 was developed Survey that will start operations CTIO in 2011. DECam CCD array inside vessel. plate cooled using closed loop liquid nitrogen system. As part development mechanical cooling design, full scale prototype vessel has been constructed now being used Multi-CCD readout tests....
The Dark Energy Survey is planning to use a 3 sq. deg. camera that houses ~ 0.5m diameter focal plane of 62 2k×4k CCDs. vessel including the optical window cell, plate, plate mounts, cooling system and thermal controls described. As part development mechanical design, full scale prototype has been constructed now being used for multi-CCD readout tests. Results from this are
The Dark Energy Survey Camera (DECam) will be comprised of a mosaic 74 charge-coupled devices (CCDs). (DES) science goals set stringent technical requirements for the CCDs. CCDs are provided by LBNL with valuable cold probe data at 233 K, providing an indication which more likely to pass. After comprehensive testing 173 about half these qualify as grade. Testing this large number determine best meet DES is very time-consuming task. We have developed multistage program automatically collect...
A new boron-coated CCD camera is described for direct detection of ultracold neutrons (UCN) through the capture reactions $^{10}$B (n,$\alpha$0$\gamma$)$^7$Li (6%) and $^{10}$B(n,$\alpha$1$\gamma$)$^7$Li (94%). The experiments, which extend earlier works using a ZnS:Ag scintillator, are based on detections neutron-capture byproducts in silicon. high position resolution, energy resolution particle ID performance scientific allows observation identification all $\alpha$, $^7$Li $\gamma$...
The Dark Energy Camera and its cooling system has been shipped to Cerro Tololo Inter-American Observatory in Chile for installation onto the Blanco 4m telescope. Along with camera, installed Coudé room at Telescope. Final of operations on telescope is planned middle 2012. Initial commissioning experiences performance described.
Large mosaic multiCCD camera is the key instrument for modern digital sky survey. DECam an extremely red sensitive 520 Megapixel designed incoming Dark Energy Survey (DES). It consist of sixty two 4k2k and twelve 2k2k 250-micron thick fully-depleted CCDs, with a focal plane 44 cm in diameter eld view 2.2 square degree. will be attached to Blanco 4-meter telescope at CTIO. The DES cover 5000 square-degrees southern galactic cap 5 color bands (g, r, i, z, Y) years starting from 2011. To...
We describe the results obtained cleaning surface of DECam CCD detectors with a new electrostatic dissipative formulation First Contact<sup>TM</sup> polymer from Photonic Cleaning Technologies. demonstrate that this product is possible without ESD damage to sensors and degradation antireflective coating used optimize optical performance detector. show more effective for than commonly acetone swab.
The Dark Energy Survey (DES) is a next generation optical survey aimed at measuring the expansion history of universe using four probes: weak gravitational lensing, galaxy cluster counts, baryon acoustic oscillations, and Type Ia supernovae. To perform survey, DES Collaboration building Camera (DECam), 3 square degree, 570 Megapixel CCD camera which will be mounted Blanco 4-meter telescope Cerro Tololo Inter-American Observatory. 5000 degrees southern galactic cap in 5 filters (g, r, i, z,...
The Coherent Neutrino-Nucleus Interaction Experiment (CONNIE) aims to detect the coherent scattering (CE$\nu$NS) of reactor antineutrinos off silicon nuclei using thick fully-depleted high-resistivity CCDs. Two Skipper-CCD sensors with sub-electron readout noise capability were installed at experiment next Angra-2 in 2021, making CONNIE first employ Skipper-CCDs for neutrino detection. We report on performance Skipper-CCDs, new data processing and quality selection techniques event CE$\nu$NS...
Millicharged particles, proposed by various extensions of the standard model, can be created in pairs high-energy photons within nuclear reactors and interact electromagnetically with electrons matter. Recently, existence a plasmon peak interaction cross-section silicon eV range was highlighted as promising approach to enhance low-energy sensitivities. The CONNIE Atucha-II reactor neutrino experiments utilize Skipper-CCD sensors, which enable detection interactions range. We present...
The CONNIE experiment uses fully depleted, high resistivity CCDs as particle detectors in an attempt to measure for the first time Coherent Neutrino-Nucleus Elastic Scattering of antineutrinos from a nuclear reactor with silicon nuclei.This talk, given at XV Mexican Workshop on Particles and Fields (MWPF), discussed potential perform this measurement, installation progress Angra dos Reis power plant, well plans future upgrades.
Ultracold neutron (UCN) projection imaging is demonstrated using a boron-coated back-illuminated CCD camera and the Los Alamos UCN source. Each recorded through capture reactions with 10B. By direct detection at least one of byproducts α, 7Li γ (electron recoils) derived from reduction thermal noise scientific camera, signal-to-noise improvement on order 104 over indirect has been achieved. Sub-pixel position resolution few microns confirmed for individual events. Projection test objects...