50 research outputs found
Administrative Experiences at Moulton Junior High
No full textOBJECTIVES
During the spring semester of 1979, Dr. Donald W. Smitley of Eastern Illinois University; Mr. Joseph Foster, Superintendent of Shelbyville School System Unit #4; and Harold O. Redicks, Principal of Moulton Junior High, agreed that the author would participate in an assortment of activities in order to gain meaningful experiences to prepare the author for a position as a school administrator. The author entered this program for the purpose of acquiring knowledge of being a school administrator and to work under the guidance of a successful superintendent and principal.
PROCEDURES
The author gained meaningful experiences by participating in and preparing the following activities for the 1979-80 school year: Daily work under the principal and superintendent Schedules for seventh and eighth grade classes Sectioning of the fifth, sixth, seventh, and eighth grade which is based on the criteria set up by the author, recommendations of teachers, and results of SRA testing Schedule for supervision and detention duties for the seventh and eighth grade teachers Schedule for the activity room to be used by fifth grade, special education, and kindergarten during inclement weather and a schedule for outside playground use in fair weather Schedule for both morning, noon, and lunch period supervision for fifth and sixth grades, and special education, and kindergarten Develop a new junior high curriculum which hopefully will be implemented in the near future. Develop a new handbook for the parents of the kindergarten students
The author feels that a good administrator should accomplish some of the following whenever time permits: standing in our corridors talking to and listening to the students throughout the day stopping by teachers\u27 rooms and visiting or discussing any problems they might be having attending all students\u27 activities and visiting classes so that the students will know that he, the principal, is interested in them and what they are doing taking time to talk and visit with parents whenever they are visiting the school being as genuinely complimentary as possible to students and staff members
Even with all the pressures, interruptions and deadlines, the author feels that being an administrator would be an enjoyable experience because of the many challenges and opportunities to work with the staff and students
High power amplifiers chain nonlinearity influence on the acelerating beam stability in free electron laser (FLASH)
No full textThe high power amplifiers transfer characteristics nonlinearities can have a negative influence on the overall system performance. This is also true for the TESLA superconducting cavities accelerating field parameters control systems. This Low Level Radio Frequency control systems uses microwave high power amplifiers (like 10 MW klystrons) as actuators in the mentioned feedback loops. The amplitude compression and phase deviations phenomena introduced to the control signals can reduce the feedback performance and cause electron beam energy instabilities. The transfer characteristics deviations in the Free Electron Laser in Hamburg experiment have been investigated. The outcome of this study together with the description of the developed linearization method based on the digital predistortion approach have been described in this paper. Additionally, the results from the linearization tool performance tests in the FLASH's RF systems have been placed
Multipurpose RF field vector controller for linear accelerators
No full textThe paper describes the design and the implementation of the flexible, multipurpose RF (Radio Frequency) field Vector Controller for the linear accelerators based on the superconducting technology. The implementation is done for the FPGA (Field Programmable Gate Array) based LLRF (Low Level Radio Frequency) control systems. The full process of the requirement analysis and the library implementation is presented. It is followed by the description of the controller's applications and the results of the performance tests. The controller fulfills the requirements of the various accelerator facilities and hardware platforms and can be easily adapted for the planned experiments to decrease their cost by avoiding expensive research and development phase
High Power Amplifiers Chain nonlinearity influence on the accelerating beam stability in free electron laser (FLASH)
No full textThe high power amplifiers transfer characteristics nonlinearities can have a negative influence on the overall system performance. This is also true for the TESLA superconducting cavities accelerating field parameters control systems. This Low Level Radio Frequency control systems uses microwave high power amplifiers (like 10 MW klystrons) as actuators in the mentioned feedback loops. The amplitude compression and phase deviations phenomena introduced to the control signals can reduce the feedback performance and cause electron beam energy instabilities. The transfer characteristics deviations in the Free Electron Laser in Hamburg experiment have been investigated. The outcome of this study together with the description of the developed linearization method based on the digital predistortion approach have been described in this paper. Additionally, the results from the linearization tool performance tests in the FLASH's RF systems have been placed
Improving Dependability of Automation for Free Electron Laser FLASH
No full textFree-electron laser FLASH (260-meter-long machine) is a pilot facility for the forthcoming XFEL (3 km). Along with growth of the experiment, service and maintenance are becoming so complex that certain degree of automation seems to be inevitable. The main purpose of the automation software is to facilitate operators with computer-aided supervision of several hardware/software subsystems. The efforts presented in this contribution concern elaboration of general framework for designing and development of automation software for the FLASH. The toolkit facilitates specification, implementation, testing and formal verification. The ultimate goal of the framework is to systematize the way of automation software development and to improve its dependability. At present usefulness of the tools is being evaluated by testing the automation software for single RF-power station of the FLASH
The Finite State Machine for Klystron Operation for VUV-FEL and European X-FEL Linear Accelerator
No full textIn order to provide a pulsed RF power signal that fulfills all designers and users demands the work on power supplies, pulse transformers, waveguides and klystrons has to be well coordinated. Because operators not engineers will operate mention user facility therefore software has to be implemented in order to automate the enormous quantity of hardware operation accompanying regular operation of linear accelerator collider. A finite state machine is adequate formal description of reactive systems that has become starting point for designing our control software. To present the complexity of the task that establishing FSM for Klystron system would be, one has to become acquainted with complexity of the system itself. Therefore this article describes the construction and principles of the klystron and modulator as well as ideas concerning the implementation of a FSM for such a system
