Fermilab's SC Accelerator Magnet Program for Future U.S. HEP Facilities

The invention of SC accelerator magnets in the 1970s opened wide the possibilities for advancing the energy frontier of particle accelerators, while limiting the machine circumference and reducing their energy consumption. The successful development of SC accelerator magnets based on NbTi superconductor have made possible a proton-antiproton collider (Tevatron) at Fermilab, an electron-proton collider (HERA) at DESY, a relativistic heavy ion collider (RHIC) at BNL and recently a proton-proton collider (LHC) at CERN. Further technological innovations and inventions are required as the US HEP looks forward towards the post-LHC energy or/and intensity frontiers. A strong, goal oriented national SC accelerator magnet program must take on this challenge to provide a strong base for the future of HEP in the U.S. The results and experience obtained by Fermilab during the past 30 years will allow us to play a leadership role in the SC accelerator magnet development in the U.S., in particular, focusing on magnets for a Muon Collider/Neutrino Factory [1]-[2]. In this paper, we summarize the required Muon Collider magnet needs and challenges, summarize the technology advances in the Fermilab accelerator magnet development over the past few years, and present and discuss our vision and long-term plans for these Fermilab-supported accelerator initiatives

Thermal analysis of SC quadrupoles in accelerator interaction regions

This paper presents results of a thermal analysis and operation margin calculation performed for NbTi and Nb{sub 3}Sn low-beta quadrupoles in collider interaction regions. Results of the thermal analysis for NbTi quadrupoles are compared with the relevant experimental data. An approach to quench limit measurements for Nb{sub 3}Sn quadrupoles is discussed

Design study of 2-in-1 large aperture ir dipole (D2) for the LHC luminosity upgrade

This paper analyses possible D2 magnet designs for the 'dipole-first' option of the LHC luminosity upgrade based on Nb3Sn superconductor and compares them in terms of the maximum field, field quality, and Lorentz forces in the coils

Single-layer high field dipole magnets

Fermilab is developing high field dipole magnets for post-LHC hadron colliders. Several designs with a nominal field of 10-12 T, coil bore size of 40-50 mm based on both shell-type and block-type coil geometry are currently under consideration. This paper presents a new approach to magnet design, based on simple and robust single-layer coils optimized for the maximum field, good field quality and minimum number of turns

The decision of technological equipment for large dimension frameworks lifting

This publication has recommendation for choosing and applying the technological infrastructure equipment, which can improve the method of large dimension frameworks lifting in buildings and constructions erection. As experimental researches and construction practice showed while increasing the ceiling panel thickness till 350-450 mm the adhesion force is enhanced and can reach 50-70% by ceiling panel mass. In that context the necessity to develop the method of adhesion force determination and find technological equipment for decreasing this force is appeared purposely for enhancing the operational efficiency of load weight-lifting equipment. The experimental researches were occurred for purpose to find out the dependence of adhesion force off amount of factors. The analytic expression, allowing calculating adhesion force, was derived after mathematical elaboration of results

Tick-Borne Encephalitis with Hemorrhagic Syndrome, Novosibirsk Region, Russia, 1999

Eight fatal cases of tick-borne encephalitis with unusual hemorrhagic syndrome were identified in 1999 in the Novosibirsk Region, Russia. To study these strains, we sequenced cDNA fragments of protein E gene from six archival formalin-fixed brain samples. Phylogenetic analysis showed tick-borne encephalitis variants clustered with a Far Eastern subtype (homology 94.7%) but not with the Siberian subtype (82%)

Study of high field superconducting solenoids for muon beam cooling

The final beam cooling stages of a possible Muon Collider may require DC solenoid magnets with magnetic fields of 40-50 T in an aperture of 40-50 mm. In this paper we study possible solutions towards creating DC fields of that order using available superconductors. Several magnetic and mechanical designs, optimized for the maximum performance are presented and compared in terms of cost and size

Asymptomatic cholelithiasis in bariatric practice

Background: The need for simultaneous cholecystectomy for asymptomatic cholelithiasis in patients undergoing bariatric intervention has not been proven. The experience of managing patients with obesity and concomitant disease cholelithiasis is presented. Aim: to determine the indications for simultaneous cholecystectomy and bariatric surgery in the combination of morbid obesity and a asymptomatic cholelithiasis. Methods: The results of observation of 37 patients with initially asymptomatic cholelithiasis were analyzed: 27 patients underwent bariatric surgery and simultaneous cholecystectomy, and 10 patients underwent only bariatric surgery. The immediate and long-term results of the treatment, the quality of life of patients and the cost of the treatment were assessed. Results: During 12 months of the follow-up, none of the patients who underwent simultaneous cholecystectomy developed any complications. Of the 10 patients in the observation group, 3 were operated on. Two patients underwent laparoscopic cholecystectomy for acute cholecystitis and one patient was operated on for choledocholithiasis with obstructive jaundice. The greatest improvement in the quality of life was observed in the gastric bypass group with simultaneous cholecystectomy. The treatment cost per patient was lower in that group, too. Conclusion: In the presence of asymptomatic cholelithiasis in a patient with morbid obesity, bariatric intervention and simultaneous cholecystectomy prevents the development of complications of cholelithiasis and thereby potentially improves the quality of life and reduces the cost of medical care