Download or read book Vibration Study of the APS Storage Ring Girder support Assembly Equipped with Wedge type Alignment Jacks written by J. A. Jendrzejczyk and published by . This book was released on 1992 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Vibration Study of the APS Storage Ring Girder written by and published by . This book was released on 1992 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt: The primary objective of this study is to evaluate and test the new girder/support assembly design from a vibration standpoint, and to determine what, if any, conditions could lead to unacceptable vibration response. There are also two secondary objectives: Determine whether smaller sliding-wedge-type jacks are needed to anchor the large alignment jacks to the lower pedestal, or if standard bolts are acceptable. Determine whether modifications to the large alignment jacks are required in order to limit unwanted horizontal motion. The modifications involve restraining the horizontal motion of the sliding-wedge jacks by six setscrews.
Download or read book Energy Research Abstracts written by and published by . This book was released on 1993 with total page 754 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Vibration Study of the APS Storage Ring 0 8 Meter Quadrupole girder Assembly written by and published by . This book was released on 1991 with total page 99 pages. Available in PDF, EPUB and Kindle. Book excerpt: The overall objective of this study is to obtain insights into the dynamic coupled behavior of the quadrupole magnet and the girder assembly, and an assessment of the potential for unacceptable vibration levels which would require redesign of the quadrupole and/or girder mounting system(s). Specific objectives include determination of vibrational characteristics (natural frequencies, damping, mode shapes, and transfer functions) of the coupled magnet/girder system, measurement of response amplitudes of forced excitation and ambient floor motion, and calculation of magnification factors associated with the observed coupled vibration modes. In the Phase 1 tests the 0.8 meter quadrupole was mounted to the girder with a prototypic mount and excitation was primarily by an electromagnetic exciter or the result of ambient floor motion, with the exception of Test 7, which was impulse excited. In the Phase 2 tests the excitation was primarily by impulse with only a few tests with ambient floor excitation. A strong, coupled magnet/girder mode response occurs at frequency of 7.62 Hz resulting in very large magnification factors (low damping values) and large displacements. It appears that a low frequency rigid body mode of the magnet coincides with a girder mode frequency. The Phase 2 tests show the effect of jackscrew conditions on system response. When the pedestal bolts were loose, the jackscrew/pedestal assembly deflected slightly from its initial vertical position, resulting in a shift in position of the jackshaft within the screw assembly. The result was a significant reduction of frequency and a large increase in damping.
Download or read book Government Reports Announcements Index written by and published by . This book was released on 1992 with total page 1736 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government Reports Annual Index written by and published by . This book was released on 1992 with total page 1400 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Brief History of the Trans Mississippi Commercial Congress written by and published by . This book was released on 1907 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Vibration Study of the APS Storage Ring Vacuum chamber written by and published by . This book was released on 1991 with total page 73 pages. Available in PDF, EPUB and Kindle. Book excerpt: The overall objective of this study is to obtain insights into the dynamic coupling between the storage ring vacuum chamber and girder, and an assessment of the potential for unacceptable vibration amplitudes that would require redesign of the vacuum chamber supports. Specific objectives include determination of the vibrational characteristics (natural frequencies and modes) of the coupled vacuum-chamber/girder system, measurement of response amplitudes to forced excitation and ambient floor motion, and calculation of magnification factors associated with the various coupled vibration modes. 1 ref.
Download or read book Response of APS Storage Ring Basemat to Ambient Vibration written by and published by . This book was released on 1992 with total page 87 pages. Available in PDF, EPUB and Kindle. Book excerpt: The storage ring of the Advanced Photon Source (APS) facility at Argonne is very sensitive to vibration. Large vibration amplitudes would result in degraded machine performance. Because the storage ring assembly is supported on the storage ring basemat, the dynamics of the basemat are critical to successful operation. Before construction began, a survey of site ground vibration indicated that the site was acceptable from a vibration standpoint. When construction of the linear accelerator (Linac) floor slab and shielding walls was completed, dynamic-response measurements were conducted. The slab/wall system showed attenuation of soilborne vibrations in the horizontal directions, but an amplification (approximately a factor of 1.5) of vertical vibration at a frequency of 7.7 Hz. Vibration response of the slab/wall system at all other frequencies showed attenuation of soilborne vibrations. Dynamic-response measurements were also conducted on an incomplete section of the storage ring basemat. Although this section was not prototypical, results were similar to those of the Linac floor in the horizontal direction, showing large damping and attenuation of horizontal soilborne vibrations. While the basemat followed the soil vibration in the vertical direction, no large amplification was observed. However, measured vertical amplitudes on the basemat were a function of location, indicating a modal response. A series of vibration response measurements was conducted on a completed section of the storage ring basemat/tunnel adjacent and to the west of the Early Assembly Area (EAA) on May 21, 1992, and is the subject of this report.
Download or read book Vibration Study of the APS Magnet Support Assemblies written by M. W. Wambsganss and published by . This book was released on 1990 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Response of APS Storage Ring Basemat to Ambient Vibration written by J. A. Jendrzejczyk and published by . This book was released on 1992 with total page 87 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Performance of the Vibration Damping Pads in the APS Storage Ring written by and published by . This book was released on 2002 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Effects of the Pedestal written by and published by . This book was released on 1993 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt: To avoid unacceptable vibration of the storage ring quadrupoles, and to ensure that the established vibration criteria are satisfied, the philosophy from inception of the APS has been (1) to locate and design the machine to minimize motion of the storage ring basemat and, (2) following construction, to monitor machine operation and user experiments to ensure that vibration sources are not introduced. This report addresses the design of the storage ring girder support assemblies, and, specifically, the effect of the pedestal/floor interface on the dynamic characteristics (i.e., resonant frequencies, damping, and mode shape).
Download or read book General Vibration Monitoring written by and published by . This book was released on 1993 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt: The primary objective of this study was to measure the coupling between a specific I-beam support structure, cantilevered from the infield side of the storage ring tunnel, and the storage ring tunnel/basemat. The support structure is mechanically connected to the side of the tunnel. It has the potential for a large resonant response and coupling to the storage ring basemat through its mechanical mounting or through the many pipes and ducts fastened to it. Impact excitation force was used to determine the lowest resonant frequency of the structure. Ambient vibration was used as the excitation source for studying the coupling.
Download or read book Vibration Analysis of APS Magnet support Systems Based on the Finite Element Method written by S. S. Chen and published by . This book was released on 1989 with total page 21 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Commissioning Results of the APS Storage Ring Diagnostics Systems written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Initial commissionings of the Advanced Photon Source (APS) 7-GeV storage ring and its diagnostics systems have been done. Early studies involved single-bunch measurements for beam transverse size ([sigma][sub x][approx] 150[mu]m, [sigma][sub y][approx] 50[mu]m), current, injection losses, and bunch length. The diagnostics have been used in studies related to the detection of an extra contribution to beam jitter at[approximately] 6.5 Hz frequency; observation of bunch lengthening ([sigma][approx] 30 to 60 ps) with single-bunch current; observation of an induced vertical, head-tail instability; and detection of a small orbit change with insertion device gap position. More recently, operations at 100-mA stored-beam current, the baseline design goal, have been achieved with the support of beam characterizations.
Download or read book Revised Lattice for the APS Storage Ring written by and published by . This book was released on 1989 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: As a result of more detailed engineering studies of vacuum chamber components and related accelerator physics studies, the circumference of the APS storage ring is increased by 44 m to a value of 1104 m. The increase is 1.1 m for each of the 40 sectors. The insertion region straight section is lengthened by 0.52 m to 6.72 m. This allows full 20-cm vacuum chamber transition sections leading into and out of the 5.2-m insertion devices. Computer studies using TBCI and MAFIA-T3 have indicated that 20-cm-long transition regions reduce the transverse coupling impedance to an Acceptable low value. The results for 10-cm transition length were marginal.
