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Control and measurement system for high quality superconducting cavities
W. Jalmuzna;W. Cichalewski;M. Wenskat;S. Karstensen;E. Elsen;T. Jezynski
2010 17th IEEE-NPSS Real Time Conference
Year: 2010 | Conference Paper |
The measurements of superconducting cavity parameters before module assembly stage are very important, because they allow to evaluate critical properties (resonant frequency, quality factor of accelerating mods) of individual resonating cavities. Such measurements are performed in Vertical Test Stand facilities. One of such setups is Vertical Test Stand II (VTS II) at DESY. It is used for conditio...Show More
Study of fill patterns for the ILC electron damping ring
2007 IEEE Particle Accelerator Conference (PAC)
Year: 2007 | Conference Paper |
Ion effects are detrimental to the performance of the electron damping ring for the International Linear Collider (ILC). Irregular bunch patterns, e.g. short bunch trains with interleaved gaps, are an effective way to alleviate ion effects. In this paper, we discuss the fill patterns and their impact on the ion effects for the ILC electron damping ring.Show More
Beam profile measurements with the 2-D laser-wire at petra
M. T. Price;G. A. Blair;G. Boorman;S. T. Boogert;A. Bosco;S. Malton;T. Kamps;K. Balewski;E. Elsen;V. Gharibyan;H-C. Lewin;F. Poirier;S. Schreiber;N. Walker;K. Wittenburg
The current PETRA II Laser-Wire system, being developed for the ILC and PETRA III, uses a piezo- driven mirror to scan laser light across an electron bunch. This paper reports on the recently installed electron-beam finding system, presenting recent horizontal and vertical profile scans with corresponding studies.Show More
First Results from the Third Level of the H1 Fast Track Trigger
A. W. Jung;A. Baird;R. Baldinger;S. Baumgartner;D. Beneckenstein;N. Berger;M.-O. Boenig;L. Caminada;D. Dodt;E. Elsen;M. Kolander;S. Kolya;K. Kruger;K. Lohwasser;D. Meer;D. Mercer;V. Michels;D. Muller;J. Muller;J. Naumann;P. R. Newman;D. Sankey;M. Sauter;A. Schoning;H.-C. Schultz-Coulon;M. Wessels;Ch. Wissing;W. Yan
2007 15th IEEE-NPSS Real-Time Conference
Year: 2007 | Conference Paper |
To make the best possible use of the higher luminosity provided by the upgraded HERA collider, the H1 collaboration has built the Fast Track Trigger (FTT). It is integrated in the first three levels (L1-L3) of the H1 trigger scheme and provides enhanced selectivity for events with charged particles. The FTT allows the reconstruction of tracks in the central drift chambers down to 100 MeV. Within t...Show More
First Results from the Third Level of the H1 Fast Track Trigger
A. W. Jung;A. Baird;R. Baldinger;S. Baumgartner;D. Beneckenstein;N. Berger;M.-O. Boenig;L. Caminada;D. Dodt;E. Elsen;M. Kolander;S. Kolya;K. Kruger;K. Lohwasser;D. Meer;D. Mercer;V. Michels;D. Muller;J. Muller;J. Naumann;P. R. Newman;D. Sankey;M. Sauter;A. Schoning;H.-C. Schultz-Coulon;M. Wessels;Ch. Wissing;W. Yan
Year: 2007 | Conference Paper |
Remote Control and Monitoring of Accelerators and Detectors in a Global Facility (GAN/GDN)
R. Bacher;S. Bourov;G. Eckerlin;E. Elsen;R. Kammering;S. Karstensen;K. Rehlich;F. J. Willeke;A. Busato;R. Pugliese;L. Chittaro;S. Gabrielli;R. Ranon
2007 15th IEEE-NPSS Real-Time Conference
Year: 2007 | Conference Paper |
Future accelerators and experiments are operated by large international collaborations and typically by dispersed teams of experts. The facilities will be operated over many years and even decades. It will be prohibitive to maintain a complete staff of experts at the site. The load of regular visits of the site is tremendously eased when experts can take action remotely. The demand for reliable re...Show More
A fast high-resolution track trigger for the H1 experiment
J. Naumann;A. Baird;E. Elsen;Y.H. Fleming;M. Kolander;S. Kolya;D. Meer;D. Mercer;P.R. Newman;D. Sankey;A. Schoning;H.-C. Schultz-Coulon;C. Wissing
After 2001, the upgraded ep collider HERA will provide an about five times higher luminosity for the two experiments H1 and ZEUS. To cope with the expected higher event rates, the H1 collaboration is building a track-based trigger system, the Fast Track Trigger (FTT). It will be integrated in the first three levels (L1-L3) of the H1 trigger scheme to provide higher selectivity for events with char...Show More
A fast high resolution track trigger for the H1 experiment
A. Baird;E. Elsen;Y.H. Fleming;M. Kolander;S. Kolya;D. Meer;D. Mercer;J. Naumann;P.R. Newman;D. Sankey;A. Schoning;H.C. Schultz-Coulon;C. Wissing
2000 IEEE Nuclear Science Symposium. Conference Record (Cat. No.00CH37149)
Year: 2000 | Conference Paper |
Cited by: Papers (2)
After 2001 the upgraded ep collider HERA will provide an about five times higher luminosity for the two experiments H1 and ZEUS. In order to cope with the expected higher event rates the H1 collaboration is building a track based trigger system, the Fast Track Trigger (FTT). It will be integrated in the first three levels (L1-L3) of the H1 trigger scheme to provide higher selectivity for event wit...Show More
A general scheme for optimization of trigger rates in an experiment with limited bandwidth
H.-C. Schultz-Coulon;J. Coughlan;E. Elsen;T. Nicholls;H. Rick
Modern, general purpose high energy physics experiments are designed to record the events of physics processes which greatly differ in rate. Both rare signatures with trigger rates of order 1 Hz and minimum bias interactions with rates sometimes approaching 1 MHz have to be triggered at the same time. The typical means of accommodating these requirements within a limited bandwidth is to downscale ...Show More
A general scheme for optimization of trigger rates in an experiment with limited bandwidth
H.-C. Schultz-Coulon;J. Coughlan;E. Elsen;T. Nicholls;H. Rick
Modern, general purpose high energy physics experiments are designed to record the events of physics processes which greatly differ in rate. Both rare signatures with trigger rates of order 1 Hz and minimum bias interactions with rates sometimes approaching 1 MHz have to be triggered at the same time. The typical means of accommodating these requirements within a limited bandwidth is to downscale ...Show More
Concept, design and performance of the second level triggers of the H1 detector
T. Nicholls;M. Charlet;J. Coughlan;E. Elsen;D. Hoffmann;H. Krehbiell;H.-C. Schultz-Coulon;J. Schutt;F. Sefkow
Since the end of the 1995 HERA running period the second level (L2) trigger system of the H1 experiment has been in operation. The L2 decision is presently derived from a combination of two independent hardware systems; one is based on the output of neural networks while the other decides on the grounds of topological event signatures in the detector. In contrast to the first level trigger (L1), w...Show More
Concept, design and performance of the second level triggers of the H1 detector
T. Nicholls;M. Charlet;E. Elsen;D. Hoffmann;H. Krehbiel;H.-C. Schultz-Coulon;J. Schutt;J. Coughlan;F. Sefkow
1997 IEEE Nuclear Science Symposium Conference Record
Year: 1997 | Conference Paper |
Since the end of the 1995 HERA running period the second level (L2) trigger system of the H1 experiment has been in operation. The L2 decision is presently derived from a combination of two independent hardware systems; one is based on the output of neural networks while the other decides on the grounds of topological event signatures in the detector. In contrast to the first level trigger (L1), w...Show More
Experience with the first level trigger of H1
H1 is a high energy physics experiment at the electron proton collider HERA at DESY, routinely taking data since 1992. Calorimetric and tracking systems record the properties of the particles produced in the collisions in a total of 270000 electronic channels. The collision frequency of 10.4 MHz necessitates pipelining of all data in the centrally clocked trigger and front end readout systems. Thi...Show More
Experience with the first level trigger of H/sub 1/
Proceedings of 1994 IEEE Nuclear Science Symposium - NSS'94
Year: 1994 | Conference Paper |
H/sub 1/ is a high energy physics experiment at the electron proton collider HERA at DESY, routinely taking data since 1992. Calorimetric and tracking systems record the properties of the particles produced in the collisions in a total of 270000 electronic channels. The collision frequency of 10 MHz necessitates pipelining of all data in the centrally clocked trigger and front end readout systems....Show More
Parallel Data Analysis in a Multichannel Flash-ADC-System
G. Eckerlin;E. Elsen;H. v. d. Schmitt;A. Wagner;P. v. Walter;M. Zimmer
Parallel analysis of drift chamber signals with M68000 processors has proven to be an efficient way to deal with the tremendous data flow generated by high speed (100 MHz) Flash-ADCs in real time. We report on the experience gained with a network of 34 processors, placed in 3 VME crates, to read out the 3072 Flash-ADC channels of the JADE Jet-Chamber at PETRA [1]. The properties of such a system a...Show More
Front End Processing for a 100 MHz Flash-ADC-System
G. Eckerlin;E. Elsen;H. v. d. Schmitt;A. Wagner;P. v. Walter
An intelligent interface for readout of a high speed (100 MHz), multichannel Flash-ADC System [1] is described. 3072 FADC channels are controlled and read by a system of 34 microprocessors M68000 placed at two different hierarchical levels. In addition to the readout itself, the processors perform a detailed pulse shape analysis neccessary for a compact and manageable data format. The purpose of t...Show More
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