1,765,412 research outputs found
Simulating the LHC collimation system with the accelerator physics library MERLIN, and loss map results
No full textWe present large scale simulations of the LHC collimation system using the MERLIN code for calculations of loss maps, currently using up to 1.5 × 10**9 halo particle
The MERLIN Simulation Program: New Features used in Studies of the LHC Collimation System using MERLIN
No full textWe present recent developments in the MERLIN particle
tracking simulation code, originally developed at DESY.
We have implemented differential scattering cross-sections
based on a pomeron exchange model interpolated over experimental
measurement data, and show that this model is
important at the small scattering angles generated in the
LHC collimators. Preliminary comparisons with previous
simulations are presented
Lettres De La Duchesse De *** Au Duc De *** / [Claude Prosper Jolyot de Crébillon]
No full textVerf. ermittelt im Vgl. mit Ausg. 1779 in COPACVorlageform der Veröffentlichungsangabe: A Paris, Chez Merlin, Libraire, rue de la Harpe, à l'Image Saint JosephErschienen: 1 (1769) - 2 (1779
Merlin++
No full textMerlin++ is an accelerator simulation program that tracks beams through components of a ring or beamline. Merlin++ is written in C++, and unlike MAD and most other packages, it is actually a library of C++ routines. The user writes their own program and compiles it against the MERLIN class definitions and function libraries.
More details can be found at merlinpp.org and github.com/MERLIN-Collaboration/MERLINChanges in release 5.03 (2020-03-06)
Merlin++ now used C++14. You may need to update your compiler.
Materials and Scattering
This release provides the ability to define materials as mixtures.
The opportunity was taken for a major cleanup of the definitions of materials and their properties, which had evolved in a haphazard way. The classes Material, MaterialDatabase, CrossSections, MaterialMixture and CompositeMaterial were replaced by MaterialProperties and MaterialData.
Code which used these classes was updated to use the new forms. This was mainly in CollimateProtonProcess and the functions it calls such as Straggle, EnergyLoss and DoScatter, which had accumulated a lot of complicated code over the years, including diagnostic features that are no longer necessary in a production system, and features which turn out not to be as useful as at first thought. Some of these updates included minor changes to the code (such as the use of the particle energy or the bunch energy) so the output is not identical to the previous version. However any such discrepancies are small compared to the overall uncertainties in the physics.
DataTable was improved with non-const iterators. Range for loops can now be used in more places.
Some changes to Exceptions. See the APIChanges document for details.
multitrack: Scripts to compare tracking of single elements between multiple tracking codes.
Some small fixes to the tracking integrators.
Cleanup to header and includes. This significantly reduces build time. You may need to check that you have include statements for all classes used in your scripts.
Full list of changes can be found using git: git log v5.02..v5.0
Contes Moraux / Par M. Mercier
No full textVorlageform der Veröffentlichungsangabe: A Amsterdam, Et se vend A Paris, Chez Merlin, Libraire, rue de la Harpe, à Saint Joseph.Erschienen: 1 (1769) - 2 (1769
Lettres De La Duchesse De *** Au Duc De ***
No full textFingerprint nach Ex. der FB Gotha und der ULB Sachsen-AnhaltVorlageform des Erscheinungsvermerks: A Paris, Chez Merlin, Libraire, rue de la Harpe, à l'Image Saint Joseph. M. DCC. LXIX
Hi-Lumi LHC Collimation Studies with MERLIN Code
No full textThe collimation system is key to the successful operation of the LHC. Measurements and simulations of the previous run at 4 TeV have shown that the system is ready for the next step, running at 7 TeV, but at the same time some sensitive cleaning locations have been identified. In particular the dispersion suppressors downstream of the betatron
cleaning region in IR7 are sensitive to single diffractive scattered protons from the collimator jaws. These particles can lead to magnet quenching. The MERLIN C++ library has been developed to exploit the functionality of an object oriented code, with improved collective effects and scattering routines. New single diffractive and elastic scattering routines, based on a fit of existing experimental data with the Regge theory of soft interactions of high energy scattering, is implemented in MERLIN. In this paper we present the impact of the new single diffractive scattering physics on the cleaning inefficiency of the LHC collimation system for the Achromatic Telescope Squeezing (ATS) PreSqueeze optics scheme, for the HL-LHC project. The results are compared with the same loss map calculated using a SixTrack+K2 like scattering routine
Mother and child in front of bark hut, Gulgong, New South Wales, ca. 1872 [picture] /
No full textTitle devised by cataloguer based on information from reference source.; Part of the collection: B.O. Holtermann archive of Merlin and Bayliss photographic prints of New South Wales and Victoria.; Inscriptions: "Beaufoy Merlin, no. 18182, American & Australasian Photographic Company Sydney Office 324 George Street"--Stamp on verso.; Condition: Fading and foxing.; Also available in electronic version via the Internet at: http://nla.gov.au/nla.pic-vn4610131; Purchased through Sydney dealer Josef Lebovic, 2008
A woman and children in front of their whitewashed cottage with shingle roof, Hill End, New South Wales, ca. 1873 [picture] /
No full textTitle devised by cataloguer based on information from acquisitions documentation and reference source.; Part of the collection: B.O. Holtermann archive of Merlin and Bayliss photographic prints of New South Wales and Victoria.; Inscriptions: "Beaufoy Merlin, no. 17771, American & Australasian Photographic Company Sydney Office 324 George Street"--Stamp on verso.; Condition: Foxing and yellowing.; Also available in electronic version via the Internet at: http://nla.gov.au/nla.pic-vn4604244; Purchased through Sydney dealer Josef Lebovic, 2008
Women and children in front of brick house with picket fence, Hill End, New South Wales, ca. 1873, 1 [picture] /
No full textTitle devised by cataloguer based on information from acquisitions documentation and reference source.; Part of the collection: B.O. Holtermann archive of Merlin and Bayliss photographic prints of New South Wales and Victoria.; Inscriptions: "Beaufoy Merlin, no.18023, American & Australasian Photographic Company Sydney Office 324 George Street"--Stamp on verso.; Condition: Yellowing and surface abrasion.; Also available in electronic version via the Internet at: http://nla.gov.au/nla.pic-vn4608660; Purchased through Sydney dealer Josef Lebovic, 2008
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