CMB-S4

We describe the stage 4 cosmic microwave background ground-based experiment CMB-S4

Multiple beam ptychography for large field-of-view, high throughput, quantitative phase contrast imaging

The ability to record large field-of-view images without a loss in spatial resolution is of crucial importance for imaging science. For most imaging techniques however, an increase in field-of-view comes at the cost of decreased resolution. Here we present a novel extension to ptychographic coherent diffractive imaging that permits simultaneous full-field imaging of multiple locations by illuminating the sample with spatially separated, interfering probes. This technique allows for large field-of-view imaging in amplitude and phase while maintaining diffraction-limited resolution, without an increase in collected data i.e. diffraction patterns acquired. (C) 2017 Elsevier B.V. All rights reserved

Bibliography of North Sea regulations Volume 1; UK, EC Directives, international codes and guidance notes

Vol. 1 of 2 vols. References to regulations, codes and guidance notes on all aspects of offshore oil and gas activities in the north-west European areaAvailable from British Library Document Supply Centre- DSC:q94/24795 / BLDSC - British Library Document Supply CentreSIGLE6. edGBUnited Kingdo

Multiple beam ptychography for high throughput data acquisition

We extend ptychography CDI to allow for imaging of multiple areas on a sample simultaneously using multiple identical beams. This enables high throughput imaging of large samples without increased data collection or loss in resolution

Spatial, spectral, and polarization multiplexed ptychography

We demonstrate ptychographic imaging of multiple areas of a sample simultaneously with no loss of resolution, by using different wavelengths or polarizations to collect independent diffraction patterns in parallel. This significantly reduces imaging times

Multiple beam ptychography

We present an extension to ptychography that allows simultaneous deconvolution of multiple, spatially separate, illuminating probes. This enables an increased field of view and hence, an increase in imaging throughput, without increased exposure times. This technique can be used for any non-interfering probes: demonstrated with multiple wavelengths and orthogonal polarizations. The latter of which gives us spatially resolved polarization spectroscopy from a single scan

Spatial, spectral, and polarization multiplexed ptychography

We introduce a novel coherent diffraction imaging technique based on ptychography that enables simultaneous full-field imaging of multiple, spatially separate, sample locations. This technique only requires that diffracted light from spatially separated sample sites be mutually incoherent at the detector, which can be achieved using multiple probes that are separated either by wavelength or by orthogonal polarization states. This approach enables spatially resolved polarization spectroscopy from a single ptychography scan, as well as allowing a larger field of view to be imaged without loss in spatial resolution. Further, we compare the numerical efficiency of the multi-mode ptychography algorithm with a single mode algorithm. (C) 2015 Optical Society of Americ

Multiple beam ptychography for large field of view imaging

We present an extension of ptychography coherent diffractive imaging that enables simultaneous imaging of several areas of an extended sample using multiple, spatially separated interfering beams. We show that this technique will increase the throughput of an imaging system by a factor that is equal to the number of beams used. This allows for the acquisition of large field of view images with near diffraction-limited resolution without an increase in data acquisition. This represents a significant step towards large field of view, high resolution imaging in the EUV and x-ray energy regimes

Electro-optical interfaces for CMS hadron calorimetry

The electro-optical interfaces for the central and endcap calorimeters of the CMS experiment at the CERN Large Hadron Collider are readout boxes that receive optical signals via fiber-optic waveguides from the calorimeter $9 scintillator megatiles that comprise the active elements of the detector and decode these signals for energy measurement. The phototransducers housed within the readout boxes are Hybrid Photodiodes (HPDs) which detect and amplify the$9 optical signals. Digitization is provided by preamplifiers or by QIE (Charge, Integration, and Encode) chips. Output signals am then transmitted from the readout boxes to Trigger/DAQ systems located off-detector. Design concepts and $9 construction details are presented for the first pre-production-prototype readout boxes. (2 refs)

CMS : the TriDAS Project Technical Design Report; v.1, the Trigger Systems

CM