[en] National key scientific project 'HIRFL-CSR Cooler Storage Ring' makes use of existing HIRFL as its pre-accelerator. In order to take the full capability of HIRFL, we have studied in detailed the matching modes between HIRFL and CSR. It is proposed to use two matching modes: direct matching between SFC (HIRFL injector cyclotron) and CSRm (CSR main ring), three-cascade matching of SFC, SSC (HIRFL main cyclotron) and CSRm. With these combinations, better beam transmission efficiency, better beam utilization efficiency of HIRFL-CSR accelerator complex and better operation efficiency of HIRFL can be obtained. In the first case, SSC can be used simultaneously in other purposes, either to accelerate medium energy heavy ions or to accelerate protons combined with another small cyclotron

No abstract available

[en] HIMM, a new compact accelerator facility dedicated to carbon cancer therapy, has been designed and is presently under construction. The synchrotron has a compact structure that exhibits a circumference of only 56.2 m. The charge exchange injection (CEI) method is adopted for synchrotron injection with a carbon-ion energy of 7 MeV/u. The third-order resonance and RF-Knock Out scheme are adopted in this machine. The general design of the machine and injection/extraction simulation results is discussed in this paper

No abstract available

[en] The status of the HIRFL (Heavy Ion Facility in Lanzhou) – Cooler Storage Ring (CSR) at the IMP is reported. The main physics goals at the HIRFL-CSR are the researches on nuclear structure and decay property, EOS of nuclear matter, hadron physics, highly charged atomic physics, high energy density physics, nuclear astrophysics, and applications for cancer therapy, space industries, materials and biology sciences. The HIRFL-CSR is the first ion cooler-storage-ring system in China, which consists of a main ring (CSRm), an experimental ring (CSRe) and a radioactive beam line (RIBLL2). The two existing cyclotrons SFC (K = 70) and SSC (K = 450) are used as its injectors. The 7 MeV/u ¹²C⁶⁺ ions were stored successfully in CSRm with the stripping injection in January 2006. After that, realized were the accelerations of ¹²C⁶⁺, ³⁶Ar¹⁸⁺, ⁷⁸Kr²⁸⁺ and ¹²⁹Xe²⁷⁺ ions with energies of 1 GeV/u, 1 GeV/u, 450 MeV/u and 235 MeV/u, respectively, including accumulation, electron cooling and acceleration. In 2008, the first two isochronous mass measurement experiments with the primary beams of ³⁶Ar¹⁸+ and ⁷⁸Kr²⁸⁺ were performed at CSRe with the Δp/p ~ 10^-5. (author)

[en] HIRFL-CSR is the post-acceleration system of the Heavy Ion Research Facility in Lanzhou and is composed of a double cooling storage ring and a radioactive beam line. The slow extraction beam from HIRFL-CSR is used in nuclear physics experiments and heavy ion therapy. 50 Hz ripple and harmonics are observed in beam spill. To improve the spill structure, the first set of control system consisting of fast Q-magnet and feedback device based FPGA is developed and installed in 2010. Spill structure feedback testing has also started. It is shown that the feedback structure has improved the spill structure, the 50 Hz ripple and its harmonics have been reduced

[en] The new national key project HIRFL-CSR is an extending project of present HIRFL (Heavy Ion Research Facility of Lanzhou) project, which consists of two cooler storage rings (CSR). The beam accumulation, injection and extraction of the rings are described in this paper. For the beam accumulation two schemes will be adopted: multiple multiturn injection scheme and RF stacking scheme. Both fast and slow extraction from the rings will be arranged in the same channels. All the above requirements result in complicated ring structures

[en] Three almost-identical rebunchers have been designed for HIRFL-CSR. The first one B1 is going to be taken the off-line test and will be installed in place soon. The rebunchers B1 and B2 are in the BL1 beam line from the injector cyclotron SFC to the main cyclotron SSC, together for the longitudinal matching between the two cyclotrons. The rebuncher B3 is in the BL2 beam line from SSC to the main ring CSRm, either working at the stand-alone mode for the beam from SSC or at the combined mode together with B1 for the beam from SFC. They work at different harmonic modes depending on the beam energy to get the best matching effect. The rebunchers of 22∼54 MHz for B1 and B2 and 23.5∼56 MHz for B3 in frequency range and 20∼120 kV in amplitude use two tuning mechanisms, where the two movable capacitors are for low frequency end and the movable short-circuit panel is for high frequency end

[en] Highlights: • The Ca₂LaSbO₆:Eu³⁺ red phosphor with double perovskite structure has been synthesized. • The phosphor exhibit high quantum efficiency and excellent thermal stability. • The PiG composite is obtained by introducing the YAG:Ce³⁺ and Ca₂LaSbO₆:Eu³⁺ into TeO₂-based glass. • The constructed w-LEDs exhibit superior optical performance and tuned chromaticity. • The PiG-based warm w-LED yields an admirable CCT of 3993 K and CRI of 86.7. Phosphors-in-glass (PiG), which serves as a potential bi-replacement of both phosphors and organic encapsulants in high-power white light-emitting diodes (w-LEDs), has captured much attention due to its high thermal conductivity and excellent thermal stability. Aiming to tune the correlated color temperature and color rendering index of YAG:Ce³⁺ PiG-based LED device, an efficient phosphor play an important function as red components are in demand to incorporate into the PiG composite. In this study, the Ca₂LaSbO₆:Eu³⁺ red phosphor with double perovskite structure has been synthesized through a high-temperature solid-state reaction. The quantum efficiency of the as-obtained phosphor reaches as high as 81%, and its luminescence intensity can remain above 80% at the temperature below of 423 K. Subsequently, the high-efficiency Ca₂LaSbO₆:Eu³⁺ and commercial YAG:Ce³⁺ phosphors are incorporated into the TeO₂-based glass to form the PiG composite. Impressively, the original emissive properties of the embedded phosphor particles are retained. Finally, the PiG encapsulated high-power w-LEDs are fabricated, exhibiting improved chromaticity feature and superior optical performance. By adjusting the mass ratio of Ca₂LaSbO₆:Eu³⁺ red phosphor to YAG:Ce³⁺ yellow one in the PiG composite, a tunable correlated color temperature ranging from cool white (6665 K) to warm one (3993 K) and the color rendering index increasing from 70.6 to 86.7 are achieved. Especially, the structured warm w-LEDs exhibits good color stability under different drive currents.

[en] CSR, a new Cooler-Storage-Ring project, is the post-acceleration system of the Heavy Ion Research Facility in Lanzhou (HIRFL). It consists of a main ring (CSRm) and an experimental ring (CSRe). From the HIRFL cyclotron system the heavy ions will be accumulated, cooled and accelerated in the CSRm, then extracted fast and injected into the CSRe for many internal-target experiments with electron cooling. The experimental ring (CSRe) will be operated with three lattice modes for different experiments. The details of the lattice for the two rings will be described in this paper