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우인식,송낙형,이영주,곽상우,방은남,이근수,김정수,장용복,박현택,홍재식,박영민,김양수,최창호,Woo, I.S.,Song, N.H.,Lee, Y.J.,Kwag, S.W.,Bang, E.N.,Lee, K.S.,Kim, J.S.,Jang, Y.B.,Park, H.T.,Hong, Jae-Sik,Park, Y.M.,Kim, Y.S.,Choi, C.H. 한국진공학회 2007 Applied Science and Convergence Technology Vol.16 No.6
KSTAR (Korea Superconducting Tokamak Advanced Research) 전류전송계 (Current Feeder System)는 4.5 K의 저온에서 운전되는 초전도자석과 300 K의 실온에서 운전되는 전원장치 (Magnet Power Supply)를 전기적으로 연결하는 장치이다. 전류전송계는 최대 35 kA의 DC 전류가 인가되는 TF 자석용 및 350초간 20$\sim$26 ㎄의펄스 전류가 인가되는 PF 자석용으로 분리되어 있으며 리드박스 내부는 전류인입선, 초전도버스라인, 열차폐체 및 냉각라인 등이 설치되어 있다. 리드박스와 초전도버스라인 진공덕트는 KSTAR 주장치와는 별도로 진공배기 시스템이 구축되어있으며, 전체적으로 아령 형상을 하고 있는 진공공간을 효율적으로 진공배기하기 위하여 버스라인 덕트와 주장치 저온용기 사이에 진공 분리막 (Vacuum Separator)이 설치되어 있다. 진공배기를 위한 초벌배기계는 로터리펌프 및 부스터펌프 (Mechanical Booster Pump)로 구축되었으며 고진공 배기계는 4대의 크라이오펌프 (Cryo-pump)로 구축되었다. 진공장치 운전을 위해 PLC 기반의 로컬 제어시스템을 구축하였고 장치 안전을 위한 자체 인터록과 중앙인터록 시스템 및 중앙제어연계시스템이 함께 구축되어 있다. 전류전송계 설치완료 후 진공배기 시운전을 통해 배기시스템의 자가진단 및 리드박스 내부에 설치되어 있는 헬륨배관의 진공누설검사를 완료하였으며, 액체질소를 사용하여 전류인입선 냉각시험을 완료하였다. Current feeder system (CFS) for Korea superconducting tokamak advanced research(KSTAR) project plays a role to interconnect magnet power supply (MPS) and superconducting (SC) magnets through the normal bus-bar at the room temperature(300 K) environment and the SC bus-line at the low temperature (4.5 K) environment. It is divided by two systems, i.e., toroidal field system which operates at 35 kA DC currents and poloidal field system wherein 20$\sim$26 kA pulsed currents are applied during 350 s transient time. Aside from the vacuum system of main cryostat, an independent vacuum system was constructed for the CFS in which a roughing system is consisted by a rotary and a mechanical booster pump and a high vacuum system is developed by four cryo-pumps with one dry pump as a backing pump. A self interlock and its control system, and a supervisory interlock and its control system are also established for the operational reliability as well. The entire CFS was completely tested including the reliability of local/supervisory control/interlock, helium gas leakage, vacuum pressure, and so on.
溫度와 施肥量에 따른 고추의 生長反應과 開花에 關한 硏究
禹仁植,卞鍾英 충남대학교 농업과학연구소 1984 農業技術硏究報告 Vol.11 No.1
This experiment was carried out to determine the effect of night temperature and amount of fertilization on growth and photosynthesis of red pepper plants for providing some basic imformations needed in improving the productivity of red pepper. 1. Plant height, stem length, number of flower buds, dry weight of plants and photosynthetic rate were higher in King Gun Gochu than in Dohusa, but number of leaves, number of internodes and leaf area were higher in Dohusa compared to King Gun Gochu. 2, Plant height, number of leaves, number of flower buds. dry weight of plants, leaf area and photosynthetic rate were significantly increased by 50% increased fertilization compared to normal fertilization. 3. High night temperature(25℃) treatment increased plant height, stem length, number of leaves, number of internodes. number of flower buds, dry weight of plants and leaf area. 4. RGR and LAR were increased by 50% increased fertilization and high night temperature but NAR was decreased by high flower buds 5. Photosynthetic rate of King Gun Gochu was increased by 50% increased fertilization and high light intensity. 6. Number of flower buds was increased at King Gun Gochu by 50% increased fertilization and high night temperature(25℃).