RFQD - a Decelerating Radio Frequency Quadrupole for the CERN Antiproton Facility

The RFQD is designed to decelerate antiprotons of momentum 100 MeV/c (kinetic energy 5.33MeV)down to a kinetic energy variable between ~10 keV and 120 keV. Inside the RFQ body, at ground potential, the rf structure of the four-rod type is mounted on insulating supports. It can be biased between plus/minus 60 kV dc to achieve the continuous adjustment of output energy required by the ASACUSA experiment at the CERN Antiproton Decelerator AD. The different parts of the system are described and the present status reported

Archaeological Survey of the Proposed Location for a New Housing Development, Morgan County, Indiana

Abstracts are made available for research purposes. To view the full report, please contact the staff of the Glenn A. Black Laboratory of Archaeology (www.gbl.indiana.edu).At the request of the Center for Behavioral Health, Inc. (CBH), the Glenn A. Black Laboratory of Archaeology, Indiana University (GBL) conducted a Phase Ia archaeological reconnaissance survey of the proposed location for a new housing development (83m x 45m; .93 acre) and its associated access road (85m x 15m; .32 acre) in the northeastern portion of Mooresville, Morgan County, Indiana. Approximately 1.25 acres were surveyed. The purposes of the survey were 1) to identify and document all of the cultural resources in the project area, 2) to evaluate any sites found with regard to their eligibility for inclusion on the National Register of Historic Places (NRHP) and the Indiana Register of Historic Sites and Structures (IRHSS), and 3) to make recommendations for the protection of significant and potentially significant sites. Fieldwork was conducted January 6, 2000 by GBL archaeologist Devin W. Fishel. No cultural materials were discovered during survey. Cultural resource clearance is therefore recommended for the proposed development site and its associated access road, provided that all earth-moving activities are restricted to the currently defined project area boundarie

Archaeological Survey of Two Proposed Cellular Communications Tower Sites, Clark County, Indiana

Abstracts are made available for research purposes. To view the full report, please contact the staff of the Glenn A. Black Laboratory of Archaeology (www.gbl.indiana.edu).At the request of ATC Associates, Inc., the Glenn A. Black Laboratory of Archaeology, Indiana University (GBL) conducted Phase Ia archaeological reconnaissance survey of two proposed cellular communications tower sites in Clark County, Indiana. Both cellular tower sites will consist of a centrally placed freestanding tower, and each will have an associated access road. Approximately 0.05 acre was surveyed at the Holemans-Allison tower site, and approximately 0.06 acre was surveyed at the Silver Creek tower site. The purposes of survey were 1) to identify and document all of the cultural resources in the project area, 2) to evaluate any sites found with regard to their eligibility for inclusion on the National Register of Historic Places (NRHP) and the Indiana Register of Historic Sites and Structures (IRHSS), and 3) to make recommendations for the protection of significant and potentially significant sites. Fieldwork was conducted January 25, 2000 by GBL archaeologists Mary E. Pirkl and Devin W. Fishel. No cultural materials were discovered at either the Holemans-Allison or Silver Creek tower sites. Cultural resource clearance is therefore recommended for the proposed development sites and their associated access roads, provided that all earth-moving activities are restricted to the currently defined project area boundaries

Archaeological Survey of Two Proposed Cellular Communications Tower Sites (Leavenworth and Sulphur), Crawford County, Indiana

Abstracts are made available for research purposes. To view the full report, please contact the staff of the Glenn A. Black Laboratory of Archaeology (www.gbl.indiana.edu).At the request of ATC Associates, Inc., the Glenn A. Black Laboratory of Archaeology, Indiana University (GBL) conducted Phase Ia archaeological reconnaissance-level survey of the proposed locations for construction of two cellular communications towers in Crawford County, Indiana. In addition to the cellular communications structures, the associated access road for each proposed location was surveyed. Approximately 0.8 acres were surveyed at the Leavenworth project area and roughly 0.5 acres were surveyed at the Sulphur project area. The purposes of survey were 1) to identify and document all of the cultural resources in the project area, 2) to evaluate any sites with regard to their eligibility for inclusion on the National Register of Historic Places (NRHP) and the Indiana Register of Historic Sites and Structures (IRHSS), and 3) to make recommendations for the protection of significant and potentially significant cultural resources. Fieldwork was conducted April 28, 2000 by GBL archaeologists Devin W. Fishel and Brian W. Troyer. One previously unrecorded prehistoric archaeological site, 12 Cr 485, was discovered at the Leavenworth project area. 12 Cr 485, a lithic scatter/reduction site of light to moderate density, is potentially eligible for inclusion on the National Register of Historic Places (NRHP) and the Indiana Register of Historic Sites and Structures (IRHSS). The results of the present Phase Ia archaeological reconnaissance survey were not adequate for determination of eligibility. Therefore avoidance of site 12 Cr 485 is recommended. If avoidance is not possible, Phase lb intensive survey is recommended in order to determine the extent and nature of buried deposits. No cultural materials were discovered at the Sulphur project area. Cultural resource clearance is therefore recommended for construction of the proposed Sulphur cellular communications tower provided that all earth-moving activities are restricted to the currently defined project area boundaries

Archaeological Survey for Proposed Impoundments Along Pucachief Creek, Cabin Sites, and an Associated Access Road in Ouabache Trails Park near Vincennes, Knox County, Indiana

Abstracts are made available for research purposes. To view the full report, please contact the staff of the Glenn A. Black Laboratory of Archaeology (www.gbl.indiana.edu).At the request of Knox County Parks and Recreation Department, the Glenn A. Black Laboratory of Archaeology, Indiana University (GBL) conducted Phase Ia archaeological reconnaissance survey along approximately 460 meters ( ca. 1500') of PucachiefCreek to be impacted by the construction of three impoundment structures, and at the location of four proposed cabin sites (10 m x 10 m each) and an associated access road (approximately 320 m x 20 m) in Ouabache Trails Park north of Vincennes, Knox County, Indiana. A total of approximately 4.0 acres were surveyed. The purposes of survey were 1) to identify and document all of the cultural resources in the project area, 2) to evaluate any sites found with regard to their eligibility for inclusion on the National Register of Historic Places (NRHP) and the Indiana Register of Historic Sites and Structures (IRHSS), and 3) to make recommendations for the protection of significant and potentially significant sites. Fieldwork was conducted April 25-26, 2000 by GBL archaeologists Devin W. Fishei Scott J. Shirar, and Brian W. Troyer. No cultural materials were discovered within the proposed project areas. Cultural resource clearance is therefore recommended for the proposed improvements to Ouabache Park provided that all earth-moving activities are restricted to the currently defined project area boundaries

CERN decelerating RFQ for antiprotons

A new decelerating radio frequency quadrupole (RFQD) has been put in operation at CERN. It decelerates either protons or antiprotons from a momentum of 100 MeV/c (kinetic energy 5.33 MeV) down to a kinetic energy variable between ~10 keV and 120 keV. A novel feature is the implementation of a floating internal RF structure, mounted on HV insulators. It allows continuous post-deceleration or acceleration from the nominal energy of 63 keV by a high tension DC bias applied to accelerating electrodes. A description of the system is given, followed by reports on the first operating experience with the ASACUSA experiment, dedicated performance measurements and consolidation progress

RHIC 28 MHz Accelerating Cavity System.

The 28 MHz accelerating system consists of a quarter wave cavity driven by an inductively coupled 100kW tetrode amplifer and 1kW solid state driver amplifer. 40dB of rf feedback closed around the cavity and amplifers reduces small perturbations within the loop by a factor of 100, and reduces the time required to shift the phase at transition by a factor of 10, limited by the saturation of the drive chain. The cavity is tuned over a 200kHz range by a mechanical tuner which varies the gap capacitance. Broadband HOM damping is provided by two orthogonal loop coupled high pass filters. Design parameters and commissioning results are presented

Design of the 26.7 MHz rf cavity for RHIC

The accelerating system for RHIC operates at 26.7 MHz (h = 342) and must capture the injected beam, accelerate it to top energy, and shorten the bunches prior to rebucketing into the storage (h = 2508) system. These different functions set the design parameters of the cavity. The frequency of 26.7 MHz has been chosen in order to provide large enough buckets to capture the injected beam from the AGS and a large linear region for debunching during a bunch rotation at top energy. Provision of the large linear region also dictates the voltage requirement of 400 kV per cavity. The cavity must be tuned {approximately}90 kHz to compensate for the change in speed of the gold beam