Latest developments and characterisation results of the MALTA sensors in TowerJazz 180nm for High Luminosity LHC

This work reports the latest observations on the behavior of two Multigap Resistive Plate Chambers (MRPC) under wide high-luminosity exposures, which motivate the development and in-beam test of the sealed MRPC prototype assembled with low-resistive glass. The operation currently being monitored, together with previous simulation results, shows the impact of gas pollution caused by avalanches in gas gaps, and the necessity to shrink the gas-streaming volume. With the lateral edge of the detector sealed by a 3D-printed frame, a reduced gas-streaming volume of ~170 mL has been achieved for a direct gas flow to the active area. A high-rate test of the sealed MRPC prototype shows that, ensuring a 97% efficiency and 70 ps time resolution, the sealed design results in a stable operation current behavior at a counting rate of 3–5 kHz/cm2. The sealed MRPC will become a potential solution for future high luminosity applications.

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IUE Studies of Luminous X-Ray Binaries

Highlights of Astronomy ◽

10.1017/s1539299600005736 ◽

1983 ◽

Vol 6 ◽

pp. 648-648

Author(s):

J.B. Hutchings

Keyword(s):

Magellanic Clouds ◽

Thick Shell ◽

High Luminosity ◽

Uv Spectrum ◽

X Ray ◽

Unique Object ◽

The Future ◽

Orbit Inclination ◽

Supercritical Accretion ◽

X Ray Binaries

IUE has been used to study 11 high luminosity X-ray binaries, of which 3 are in the Magellanic Clouds. In the supergiant systems, X-ray ionisation bubbles have been found in most cases, leading to a greater understanding of the winds and accretion processes. Further studies of precessing objects such as LMC X-4 with IUE and ST are clearly of considerable interest, relating to X-ray heating and blanketing. Detailed studies of the Cyg X-l ionisation bubble may resolve the long standing puzzle of its orbit inclination and masses. UV continua have furnished valuable information on extinction, temperatures and luminosities, and the presence of non-stellar (i.e. disk) luminosity. Here too, more detailed studies are clearly indicated for the future. A unique object of interest is the LMC transient 0538-66 whose UV spectrum has quasarlike lines and luminosity which varies oppositely to the visible. This may be a case of supercritical accretion generating an optically thick shell (“disk”) about the pulsar.

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Cavity voltage phase modulation to reduce the high-luminosity Large Hadron Collider rf power requirements

Physical Review Accelerators and Beams ◽

10.1103/physrevaccelbeams.20.101003 ◽

2017 ◽

Vol 20 (10) ◽

Cited By ~ 3

Author(s):

T. Mastoridis ◽

P. Baudrenghien ◽

J. Molendijk

Keyword(s):

Large Hadron Collider ◽

Phase Modulation ◽

Hadron Collider ◽

Rf Power ◽

High Luminosity ◽

Voltage Phase

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Radiation hard monolithic CMOS sensors with small electrodes for High Luminosity LHC

Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment ◽

10.1016/j.nima.2020.164381 ◽

2021 ◽

Vol 986 ◽

pp. 164381

Author(s):

H. Pernegger ◽

P. Allport ◽

I. Asensi Tortajada ◽

M. Barbero ◽

P. Barrillon ◽

...

Keyword(s):

High Luminosity ◽

Cmos Sensors ◽

Radiation Hard

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Evolution of O stars and the WR connection

Symposium - International Astronomical Union ◽

10.1017/s0074180900013838 ◽

1979 ◽

Vol 83 ◽

pp. 431-445 ◽

Cited By ~ 3

Author(s):

Peter S. Conti

Keyword(s):

Mass Loss ◽

Stellar Wind ◽

High Luminosity ◽

Loss Mechanism ◽

Evolutionary Scenario ◽

Processed Material ◽

Dominant Process ◽

Highly Evolved ◽

Loss Rates ◽

Enriched Composition

The stellar wind mass loss rates of at least some single Of type stars appear to be sufficient to remove much if not all of the hydrogen-rich envelope such that nuclear processed material is observed at the surface. This highly evolved state can then be naturally associated with classic Population I WR stars that have properties of high luminosity for their mass, helium enriched composition, and nitrogen or carbon enhanced abundances. If stellar wind mass loss is the dominant process involved in this evolutionary scenario, then stars with properties intermediate between Of and WR types should exist. The stellar parameters of luminosity, temperature, mass and composition are briefly reviewed for both types. All late WN stars so far observed are relatively luminous like Of stars, and also contain hydrogen. All early WN stars, and WC stars, are relatively faint and contain little or no hydrogen. The late WN stars seem to have the intermediate properties required if a stellar wind is the dominant mass loss mechanism that transforms an Of star to a WR type.

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Achieving high luminosity in the Fermilab Tevatron

Conference Record of the 1991 IEEE Particle Accelerator Conference ◽

10.1109/pac.1991.165139 ◽

2002 ◽

Cited By ~ 5

Author(s):

S.D. Holmes

Keyword(s):

High Luminosity

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EVENTS WITH ISOLATED CHARGED LEPTONS AND LARGE MISSING TRANSVERSE MOMENTUM AT HERA

Modern Physics Letters A ◽

10.1142/s0217732304015142 ◽

2004 ◽

Vol 19 (25) ◽

pp. 1881-1902 ◽

Cited By ~ 4

Author(s):

TANCREDI CARLI ◽

DOMINIK DANNHEIM ◽

LORENZO BELLAGAMBA

Keyword(s):

Transverse Momentum ◽

Zeus Collaboration ◽

Tau Leptons ◽

High Luminosity ◽

Final State ◽

Missing Transverse Momentum ◽

State Formula ◽

Charged Leptons ◽

Good Agreement ◽

Event Topology

Striking events with isolated charged leptons, large missing transverse momentum and large transverse momentum of the hadronic final state [Formula: see text] were observed at the electron proton collider HERA in a data sample corresponding to an integrated luminosity of about 130 pb-1. The H1 collaboration observed 11 events with isolated electrons or muons and with [Formula: see text]. Only 3.4±0.6 events were expected from Standard Model (SM) processes. Six of these events have [Formula: see text], while 1.3±0.3 events were expected. The ZEUS collaboration observed good agreement with the SM. However, ZEUS found two events with a similar event topology, but tau leptons instead of electrons or muons in the final state. Only 0.2±0.05 events were expected from SM processes. For various hypotheses, the compatibility of the experimental results was investigated with respect to the SM and with respect to possible explanations beyond the SM. Prospects for the high-luminosity HERA-II data taking period are given.

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