Iranian Light Source Facility (ILSF) is a new 3 GeV synchrotron radiation laboratory in the Middle East. The ILSF storage ring (SR) is based on a Five-Bend Achromat lattice, providing a beam emittance of 0. 48 nm rad. The ring is consisting of 100 pure dipole, 320 quadrupole and 320 sextupole MAGNETS. In this paper, we present some design features of the SR MAGNETS and discuss their detailed physical design.

In this study, nine Nd-Fe-B and FeCe thin films with 10-50 nanometers width were prepared by RF magnetron sputtering on the Si/SiO2 substrate. Then, the films were annealed at 800oC for 5 sec in rapid thermal annealing furnace. X-ray diffractometry (XRD) was used to analyze the phase composition of layers and existance of Nd2F14 and Fe65Co35 phase was confirmed, without formation of any other secondary phase. The layers surfaces were investigated using Field Emission Scanning Electron Microscope (FESEM). The morphology of layers surfaces was investigated using Atomic Force Microscope (AFM). The magnetic properties of layers were evaluated by vibrating sample magnetometer with maximum applied field of 24kOe, in order to measure coercivity, saturation of magnetization, hysteresis area, rectangular ratio and (BH)max. It was found that all layers have vertical magnetic anisotropy. Increasing thickness of FeCo resulted in increasing saturation of magnetization, coercivity and saturation magnetization. The results indicate that by an increase in thickness of FeCo up to 20nm, exchange interaction strength between hard and soft magnetic layers is enhanced and, consequently, maximum energy induced from this hetero-structure is increased.

The aim of this paper is to introduce different uses of MAGNETS in orthodontic treatments. Since 1980s rare-earth MAGNETS are used in various tooth movements for example space closure and forced eruption and extrusion of impacted teeth.Some studies have shown that the use of MAGNETS makes tooth movement faster and with less pain and discomfort. But yet the use of this appliance is not proved to be convenient due to its expense and large volume.

Manufacture of polymeric composite MAGNETS using isotropic NdFeB powder and different polymeric matrices; polyethylene glycol (PEG) as thermoplastic, epoxy as thermoset and styrene butadiene rubber (SBR) as elastomeric matrices have been studied in this work. Magnet powder was crushed mechanically and sorted in the particle sizes of 74-100, 2-10, and ≤1 microns. PEG nano-powder was also prepared via solvent/non-solvent method. The effects of particle size of the magnetic powder, polymer content, type of polymeric matrices and processing conditions on the magnetic properties of the product, i.e. residual magnetic induction (Br), coercive field strength (Hc), maximum energy product (BH)max and density were investigated. NdFeB-PEG permanent composite magnet made of magnetic powders with particle size range of 74-100mm and 5 php (the ratio of polymer loading per 100g magnetic powder) of PEG nano-powder was found to have the best magnetic properties. The measured properties of this product were as follows: final density; r=5.444 g/mL; Br=3.82 kG, Hc=8.415 kOe; (BH)max=14.454 MGOe.

To reveal microstructural details in sintered permanent MAGNETS with a composition Nd17Fe765B5Cu15, optical microscopy and analytical transmission electron microscopy (TEM) were employed, supported by electron probe micro-analysis (EPMA), differential thermal analysis (DTA) and thermal magnetic analysis (TMA). To obtain good magnetic properties, a two-step heat treatment was applied to the sintered MAGNETS produced by the hydrogen decrepitaion (HD) process. The microstructure consists of four phases: Nd2Fe14B1(Φ), a Nd-rich (n) phase, a Nd1Cu1-type phase and a phase Nd6Fe13Cu1 (Nd30Fe65Cu). The NdCu-type phase is, together with the Nd-rich phase, part of a binary eutectic and exhibits a homogeneity range in composition, whereas none was found for Nd6Fe13Cu1. Studies by electron and X-ray diffraction disclosed a complicated structure which to date has been impossible to determine.

Introduction: Rehabilitation of facial defect with an intraoral communication is a difficult challenge for the maxillofacial prosthodontist. The use of MAGNETS is the most efficient means of providing combination prostheses with adequate retention and stability.The aim of this report was to describe a simple method of fabricating an obturator-eye combination prosthesis using MAGNETS.Case Report: A 54-year-old edentulous female patient with the history of diabetes mellitus, hypertension and coronary bypass surgery was referred for definitive prosthetic rehabilitation 8 months after the surgical resection of a mucormycosis intraoral-facial combination defect. The patients underwent a partial left maxillectomy and left orbital exoneration which removed all adjacent tissues. Swallowing and mastication problems were experienced postoperatively, and the patient complained from her appearance. The proposed treatment plan included construction of a maxillary complete denture with a palatal obturator and a mandibular complete denture. MAGNETS were used to attach the oculopalpebral prosthesis to the maxillary obturator.Conclusion: The prosthetic rehabilitation of a patient with a combined intraoral-extraoral defect was presented. Use of retention MAGNETS retains denture and makes it stable and comfortable for the patient. This treatment improves oral function as well as esthetics.

Hypothesis: In recent years, much attention has been paid to the use of BaFe12O19 barium ferrite magnetic material in the manufacture of polymer composite MAGNETS. Hence, nitrile butadiene rubber-polyvinyl chloride (NBRPVC) polymer composite MAGNETS containing barium ferrite alloy powder BaFe12O19 with particles less than 5 microns were made with optimal properties Methods: The effect of different amounts of barium ferrite magnetic powder in the polymer subs trate on the magnetic, morphological and mechanical properties of barium ferrite polymer MAGNETS was inves tigated using SEM images and VSM diagrams and tensile tes t. Results: NBR-PVC/ BaFe12O19 composite MAGNETS containing 70 %wt NBR and 30 %wt PVC with 100 units of base rubber (phr) including 2 units of sulfur as baking agent, 4 units of zinc oxide as activator, 3 units of s tearic acid as lubricant, 2 units of tetramethyl thioram disulfide (TMTD) and 2 units of mercapto-benzythiazyl disulfide (MBTS) as accelerator and barium ferrite powder BaFe12O19 were fabricated with a particle size of less than 5 microns and a combination of different percentages as a magnetic agent. Among the samples made, N-P/F80 composite MAGNETS with a ratio of 20: 80 (powder: polymer) had the highes t saturation magnetism of Ms and the residual magnetization of Mr and the lowes t intrinsic coercivity of Hc. As expected, the bes t sample in terms of tensile s trength was N-P/F20 with a powder: polymer ratio of 80: 20, and finally, according to all the results related to the magnetic, morphological and mechanical properties of the samples, the mos t suitable one in terms of good particle dispersion in the polymer subs trate and suitable tensile s trength and appropriate magnetic properties of N-P/F50 with 50: 50 (powder: polymer) ratio was selected.

The Iranian Light Source Facility (ILSF) booster main specifications including 250 ms ramp up, 2Hz repetition rate, and quasi-sinusoidal wave shape, up to this point have been the basis for calculations. Each family of MAGNETS including Dipole, Quadrupole and Sextupoles will feed by individual power supply. In order to maintain constant transverse tunes and chromaticity while the beam is accelerated, quadrupole and sextupole magnet currents must closely track the current in the dipole MAGNETS. In booster rings, feeding the high inductance load, tracking of Quadrupole and sextupole MAGNETS, reducing output current fluctuation and having a precise high bandwidth current regulation system are particular challenges. In order to meet the requirements, it is necessary to have a fully digital controller to achieve a fast regulation system. The prototype power supply and its test results are described in this paper.

The corrosion behavior of some Nd-Fe-B MAGNETS is compared with a near stoichiometric Nd12.8Fe79.8B7.4 alloy. The microstructure of MAGNETS was characterized using a scanning electron microscope (SEM) equipped with an energy dispersive X-ray (EDX) analizer. The corrosion behavior of MAGNETS was studied at room temperature using an EG&G potentiostate analyzer in 0.01 and 0/1 molar H2SO4 solutions.The results of EDX analyses show that the weight ratio of Transition-Metals to Rare-Earth elements could be efficient criteria for recognizing the main Nd2Fe14B magnetic phase in the structure of the MAGNETS. By reduction of the Nd-rich grain boundary phase and/or substitution of some Fe atoms by Co, a vital improvement in the corrosion resistance of the MAGNETS was observed, due to a decrease in the galvanic coupling effect between Nd-rich and Nd2Fe14B magnetic phases.