Luciano Elementi

• Fermi National Accelerator Laboratory (Fermilab)

The muon-to-electron conversion (Mu2e) experiment at Fermilab will be used to search for the charged lepton flavor-violating conversion of muons to electrons in the field of an atomic nucleus. The Mu2e experiment is currently in the construction stage. The scope of this paper is the cryogenic distribution system and superconducting power leads for...

The muon-to-electron conversion (Mu2e) experiment at Fermilab will be used to search for the charged lepton flavor-violating conversion of muons to electrons in the field of an atomic nucleus. The Mu2e experiment is currently in the construction stage. The scope of this paper is the cryogenic distribution system and superconducting power leads for...

The muon-to-electron conversion (Mu2e) experiment at Fermilab will be used to search for the charged lepton flavor-violating conversion of muons to electrons in the field of an atomic nucleus. The Mu2e experiment is currently in the design and construction stage and is expected to begin operations in 2022. The Mu2e experiment uses four large superc...

As part of the Jefferson Lab 12 GeV upgrade, the Hall B CLAS12 system requires two superconducting iron-free magnets — a torus and a solenoid. The physics requirements to maximize space for the detectors guided engineers toward particular coil designs for each of the magnets which, in turn, led to the choice of using conduction cooling. The torus c...

The goal of the Mu2e experiment at Fermilab is to search for charged-lepton flavor violation by looking for neutrino-less muon to electron conversion in the field of the nucleus. The Mu2e experimental apparatus utilizes a complex magnetic field in the muon generation and momentum and charge selection process. Precise knowledge of the magnetic field...

The Mu2e experiment at Fermilab plans to search for charged-lepton flavor violations by looking for neutrino-less muon to electron conversions in the field of the nucleus. A complex solenoid system and precise knowledge of its magnetic field play a major role in the experimental approach Mu2e has chosen. It is essential to map the solenoid field up...

Fermi National Accelerator Laboratory (Fermilab) fabricated the torus magnet coils for the 12-GeV Hall B upgrade at Jefferson Lab (JLab). The production consisted of six large superconducting coils for the magnet and two spare coils. The toroidal field coils are approximately 2 m x 4 m x 5 cm thick. Each of these coils consists of two layers, each...

The design of the 12-GeV torus required the construction of six superconducting coils with a unique geometry required for the experimental needs of Jefferson Laboratory Hall B. Each of these coils consists of 234 turns of copper-stabilized superconducting cable conduction cooled by 4.6 K helium gas. The finished coils are each roughly 2 × 4 × 0.05...

The CLAS12 Torus is a toroidal superconducting magnet, which is part of the detector for the 12-GeV accelerator upgrade at Jefferson Laboratory (JLab). The coils were wound/fabricated by Fermilab, with JLab responsible for all other parts of the project scope, including design, integration, cryostating the individual coils, installation, cryogenics...

Mu2e, a charged lepton flavor violation (CLFV) experiment is planned to start at Fermilab late in this decade. The proposed experiment will search for neutrinoless muon to electron conversions with unprecedented sensitivity, better than 6 x 10{sup -17 }at 90% CL. To achieve this sensitivity the incoming proton beam must be highly suppressed during...

Fermilab's cabling facility has been upgraded to a maximum capability of 42 strands. This facility is being used to study the effect of cabling on the performance of the various strands, and for the development and fabrication of cables in support of the ongoing magnet R&D programs. Rutherford cables of various geometries, packing factors, with and...

In 2003 a simple digital level system was developed to allow for rapid roll measurements of all dipoles and quadrupoles in the Tevatron. The system uses a Mitutoyo digital level and a PC running MS WINDOWS XP and LAB VIEW to acquire data on the upstream and downstream roll of each magnet. The system is sufficiently simple that all 1,000 magnets in...

Chemical polishing of surfaces of Nb RF cavities is an important part of cavity fabrication process. Because of the dangerous nature of the chemicals involved in the process, safety considerations require careful design of the facility and of the process. This report describes the major features of the facility prototype at FNAL and a description o...

Fermilab is involved in the development of new generation high-field accelerator magnets using state-of-the-art Nb₃Sn strands produced using different technologies. Two 1-m long models-mirror configuration and dipole magnet-were fabricated recently at Fermilab based on powder-in-tube (PIT) Nb₃Sn strands with small effective fi...

Fermilab is developing and investigating different high-field magnets (HFM) for present and future accelerators. The HFM R&D program focused on the 10-12 T magnets based on Nb₃Sn superconductor and explored both basic magnet technologies for brittle superconductors-wind-and-react and react-and-wind. Magnet design studies in support of LH...

It was observed during the early part of Run II that dipole corrector currents in the Tevatron were changing over time. Measurement of the roll for dipoles and quadrupoles confirmed that there was a slow and systematic movement of the magnets from their ideal position. A simple system using a digital protractor and laptop computer was developed to...

Fermilab is developing and investigating different high-field magnet designs for present and future accelerators. The magnet R&D program was focused on the 10-12 T accelerator magnets based on NbSn superconductor and explored both basic magnet technologies for brittle superconductors--wind-and-react and react-and-wind. Magnet design studies in supp...

An apparatus for the measurement, under transverse pressure, of the inter‐strand contact resistance in epoxy‐impregnated Nb3Sn Rutherford cables has been recently assembled at Fermilab. Procedures have been developed to instrument and measure samples extracted from Nb3Sn coils. Samples were extracted from coils fabricated with the Wind‐and‐React an...

Fermilab is developing a new generation of high-field superconducting magnets for future accelerators based on Nb3Sn. Rutherford-type cables of 27 and 28 strands of various structures, packing factors, with and without a stainless steel core, were fabricated at Fermilab out of Cu, NbTi and various Nb3Sn strands. The effect of cabling degradation w...

The surface processing is one of the key elements of superconducting RF cavity fabrication. Safety and reliability are the main requirements for the chemical surface treatment facility being developed at FNAL. Accepting the Buffered Chemical Polishing (BCP) as the baseline process, a ''gravity feed and open etching tank'' approach has been chosen a...

This paper presents past results and future goals of the Nb₃Sn strand and cable R&D being performed within the High Field Magnet program at Fermilab. Research tools include a reaction site for Nb₃Sn, a Short Sample Test Facility, a Scanning Electron Microscope, and a 28-strand cabling machine. Strands of various designs and di...

Scanning Tunneling Microscopy (STM) reveals details down to the molecular and submolecular scale. This paper presents STM images taken under solution of three well known organic compounds deposited on highly oriented pyrolitic graphite. Dotriacontane, stearic acid and tetracosanoic acid showed to form highly organized monolayers that have a charact...

Molecular monolayer structure investigations have been performed by Scanning Tunneling Microscopy (STM) on self-assembled systems made of dotriacontane, stearic acid, tetracosanoic acid and octadecylmercaptane adsorbed on graphite. High-resolution voltage-bias dependent STM images have been obtained and conditions for optimal image contrast are dis...

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This report presents the design of a sample holder for measurement of the critical current of Nb3Sn cables at FRESCA (CERN cable test facility). This design is based on the sample holder presently used at FRESCA for NbTi cables and fits its external part ("collars"). The Nb3Sn cables will be heat- treated using a reaction holder and an appositely d...

Fermilab has been steadily developing its SRF cavity expertise, infrastructure and technology base. We particularly emphasize here recent developments in understanding basic material properties and developing a new chemistry treatment facility.

This note presents the results of the measurement of the Inter-strand Contact Resistance (ICR) of five cables part of coil sections extracted from the straight sections LHC_IR quadrupole magnets and models. The measured inner coil was extracted from MQXB04, the outer coil was extracted from a short model. Both coils were wound using cables made of...

Common interest at Argonne and Fermi National Accelerator Laboratories in developing superconducting cavities for projects such as RIA, the ILC and the 8 GeV FNAL Proton Driver has led to a new joint cavity surface processing facility with initial operations to start this fall and full operations in early 2006. This 200 m 2 single cavity processing...