FPGA based Readout Logic of the Front-end Electronics of the ATLAS Absolute Luminosity Monitor

Readout of data from front-end electronics of the ATLAS Absolute Luminosity Monitor is controlled by programmable devices. Alfa-R is a local readout controller which reads digitized data with LHC clock and keeps them until validation of the first level trigger. Alfa-M is a global readout controller which reads validated events from 23 Alfa-R controllers, forms a data block and sends it to an acquisition system. In this article, description of logic of both controllers is presented as well as is shown how the controllers can be set up and monitored from an user level

System Design of the ATLAS Absolute Luminosity Monitor

The ATLAS absolute luminosity monitor is composed of 8 roman pots symmetrically located in the LHC tunnel. Each pot contains 23 multi anode photomultiplier tubes, and each one of those is fitted with a front-end assembly called PMF. A PMF provides the high voltage biasing of the tube, the frontend readout chip and the readout logic in a very compact arrangement. The 25 PMFs contained in one roman pot are connected to a motherboard used as an interface to the backend electronics. The system allows to configure the front-end electronics from the ATLAS detector control system and to transmit the luminosity data over Slink

PMF the front end electronic for the ALFA detector

International audienceThe PMF (Photo Multiplier Front end) is the front end electronics designed for the ATLAS luminometer ALFA (Absolute Luminosity For ATLAS) made of 20 staggered U-V scintillating fiber layers inserted in Roman Pots (eight in total). Each of these plans is made of 64 fibers. The PMF consists of a 64 channels photomultiplier (MAPMT) and a very compact stack of three different PCBs (3x3 cm2), mounted directly on the back and in the shadow of the MAPMT: a board which brings the high voltage to the MAPMT, an intermediate board used to send the signals to connectors located on the edge and, finally, a board with the readout chip MAROC (Multi Anode Read Out Chip), directly bonded on the PCB, on one side and a FPGA on the other. The 64 inputs MAROC ASIC allows correcting for the gain spread of MAPMT channels thanks to a 6 bits variable gain preamplifier. For each channel the signal is shaped (fast shaper, 15ns) and discriminated to produce a trigger output. A multiplexed charge output is also produced both in analog and digital thanks to a Wilkinson ADC. The main requirements are the following: 100 % trigger efficiency for a signal greater than 1/3 of a photoelectron, a charge measurement up to 30 photoelectrons with a linearity of 2 % or better and a cross talk of 1 % or less. The performances of the second version of MAROC were checked successfully during the year 2007 at LAL-Orsay. A nice dispersion of the trigger output (± 5 fC) was, in particular, observed. A sample of PMFs was produced during autumn 2007 as a prototype. Laboratory tests were performed both at LAL and CERN respectively on the third PCB (the one with MAROC) and on a full PMF equipped with a MAPMT illuminated by a LED. They were carried out using dedicated test board and acquisition software and have allowed the approval of the design and the green light for the final production and integration with the detector. Beam tests of a complete Roman Pot, equipped with 23 PMFs, will take place during summer 2008 for two periods and will conclude the test phase and mark the beginning of the final production

Hadron beam test of a scintillating fibre tracker system for elastic scattering and luminosity measurement in ATLAS

A scintillating fibre tracker is proposed to measure elastic proton scattering at very small angles in the ATLAS experiment at CERN. The tracker will be located in so-called Roman Pot units at a distance of 240 m on each side of the ATLAS interaction point. An initial validation of the design choices was achieved in a beam test at DESY in a relatively low energy electron beam and using slow off-the-shelf electronics. Here we report on the results from a second beam test experiment carried out at CERN, where new detector prototypes were tested in a high energy hadron beam, using the first version of the custom designed front-end electronics. The results show an adequate tracking performance under conditions which are similar to the situation at the LHC. In addition, the alignment method using so-called overlap detectors was studied and shown to have the expected precision.Comment: 12 pages, 8 figures. Submitted to Journal of Instrumentation (JINST

The Vehicle, Spring 1993

Table of Contents The Shape of Things to Come.Peter F. Essigpage 6 SaxophoneWalt Howardpage 6 Gravity BedSue Songerpage 7 UntitledJennifer Gutowskipage 8 uncertaintyWalt Howardpage 9 Ruth Ann, et. al.Susan Eisenhourpage 9 Failed IndustryScott Langenpage 10 UntitledKaren Wisspage 10 wanted:Walt Howardpage 10 Dida; 1978Diana Matijaspage 11 UntitledJennifer Gutowskipage 12 The Lesson in NovemberSue Songerpage 13 Coal MinerJames P. Tangpage 16 Christmas CrueltySue Songerpage 17 Astral ProjectionSusan Eisenhourpage 18 UntitledBen Hausmannpage 19 Into Zagreb\u27s Evening*Diana Matjaspage 20 UntitledJennifer Gutowskipage 22 The AnniversaryJennifer Moropage 23 NudeDan Trutterpage 24 death for saleWalt Howardpage 24 JudgedKevin St. Angelpage 25 Nature\u27s RefugeeScott Langenpage 25 Arrowhead Hunting at TippecanoeJennifer Moropage 26 UntitledKimberly Foxpage 27 TAINTED LOVESarah C. Patiencepage 28 cemeteryWalt Howardpage 28 Cow GameSusan Eisenhourpage 29 UntitledJennifer Gutowskipage 31 ReflectionsPeter F. Essigpage 32 Destination U.S.A.Dan Trutterpage 33 UntitledMario Letopage 33 Authors\u27 Pagepage 34https://thekeep.eiu.edu/vehicle/1061/thumbnail.jp

The Vehicle, Spring 1993

Table of Contents The Shape of Things to Come.Peter F. Essigpage 6 SaxophoneWalt Howardpage 6 Gravity BedSue Songerpage 7 UntitledJennifer Gutowskipage 8 uncertaintyWalt Howardpage 9 Ruth Ann, et. al.Susan Eisenhourpage 9 Failed IndustryScott Langenpage 10 UntitledKaren Wisspage 10 wanted:Walt Howardpage 10 Dida; 1978Diana Matijaspage 11 UntitledJennifer Gutowskipage 12 The Lesson in NovemberSue Songerpage 13 Coal MinerJames P. Tangpage 16 Christmas CrueltySue Songerpage 17 Astral ProjectionSusan Eisenhourpage 18 UntitledBen Hausmannpage 19 Into Zagreb\u27s Evening*Diana Matjaspage 20 UntitledJennifer Gutowskipage 22 The AnniversaryJennifer Moropage 23 NudeDan Trutterpage 24 death for saleWalt Howardpage 24 JudgedKevin St. Angelpage 25 Nature\u27s RefugeeScott Langenpage 25 Arrowhead Hunting at TippecanoeJennifer Moropage 26 UntitledKimberly Foxpage 27 TAINTED LOVESarah C. Patiencepage 28 cemeteryWalt Howardpage 28 Cow GameSusan Eisenhourpage 29 UntitledJennifer Gutowskipage 31 ReflectionsPeter F. Essigpage 32 Destination U.S.A.Dan Trutterpage 33 UntitledMario Letopage 33 Authors\u27 Pagepage 34https://thekeep.eiu.edu/vehicle/1061/thumbnail.jp

The Vehicle, Spring 1994

Table of Contents Thoughts in the IGASue Songerpage 6 The Cries of an Innocent Tea BagWojnarowski Yvonnepage 7 Proud HarpySusan Eisenhourpage 8 Bus Number TwoMindy Glazepage 9 My Home TownScott Langenpage 10 MemoriesMaggie Willpage 11 Vase (Artwork)Gail Valkerpage 12 The Last HuntMark Kannmacherpage 13 Corn DanceJulia A. Canhampage 14 Untitled (Photography)Rachel Corbettpage 14 Paradise (Artwork)Gail Valkerpage 15 Holding Back A ScreamElise Kirarpage 16 poetry isJonathan W. Iwanskipage 17 loveCatherine DeGraafpage 18 The OneTim Rileypage 18 Reading His Words on a Frosty EveningTom McGrathpage 19 UntitledBob Newellpage 19 The Ice StormMindy Glazepage 20 UntitledJonathan W. Iwanskipage 21 Untitled (Photography)Rachel Corbettpage 23 cityscapeChris Pomeroypage 24 Untitled (Photography)Rachel Corbettpage 25 Quarter Pound TemptationBryan Levekpage 26 Photograph (Artwork)Gail Valkerpage 29 Don\u27t Talk to StrangersJon Montgomerypage 30 Untitled (Photography)Rachel Corbettpage 33 Charleston, U.S.A. (Artwork)Gail Valkerpage 34 Fun With Nature (Artwork)Gail Valkerpage 34https://thekeep.eiu.edu/vehicle/1064/thumbnail.jp

Esophageal squamous cell carcinoma presenting with extensive skin lesions: a case report

<p>Abstract</p> <p>Introduction</p> <p>Esophageal squamous cell carcinoma (ESCC) is the most common histological subtype of cancer in the upper and middle esophagus and is characterized by a high rate of mortality. The incidence of esophageal cancer varies greatly among regions of the world and occurs at a high frequency in Asia and South America.</p> <p>Case presentation</p> <p>In our department, a 51-year-old man was diagnosed with ESCC after presenting with extensive disseminated skin nodules. Biopsy of the nodules showed metastatic ESCC. Cutaneous manifestations of esophageal neoplasia are very rare and are mainly described for esophageal adenocarcinoma (EADC). Here we report a very uncommon case of extensive skin metastases of ESCC.</p> <p>Conclusion</p> <p>Early biopsies of suspicious skin lesions are important and should be performed in patients with unclear symptoms such as weight loss or dysphagia and especially in patients with a history of cancer, since they can reveal the existence of a distant malignant disease leading to diagnosis and prompt therapy.</p

Expected Performance of the ATLAS Experiment - Detector, Trigger and Physics

A detailed study is presented of the expected performance of the ATLAS detector. The reconstruction of tracks, leptons, photons, missing energy and jets is investigated, together with the performance of b-tagging and the trigger. The physics potential for a variety of interesting physics processes, within the Standard Model and beyond, is examined. The study comprises a series of notes based on simulations of the detector and physics processes, with particular emphasis given to the data expected from the first years of operation of the LHC at CERN