Matching Items (2)
Description
ABSTRACT Many musicians, both amateur and professional alike, are continuously seeking to expand and explore their performance literature and repertory. Introducing new works into the standard repertory is an exciting endeavor for any active musician. Establishing connections, commissioning new works, and collaborating on performances can all work together toward the acceptance and success of a composer's music within an instrument community. For the flute, one such composer is Daniel Dorff (b. 1956). Dorff, a Philadelphia-based composer, has written for symphony orchestra, clarinet, contrabassoon, and others; however, his award-winning works for flute and piccolo are earning him much recognition. He has written works for such illustrious flutists as Mimi Stillman, Walfrid Kujala, and Gary Schocker; his flute works have been recorded by Laurel Zucker, Pamela Youngblood and Lois Bliss Herbine; and his pieces have been performed and premiered at each of the National Flute Association Conventions from 2004 to 2009. Despite this success, little has been written about Dorff's life, compositional style, and contributions to the flute repertory. In order to further promote the flute works of Daniel Dorff, the primary focus of this study is the creation of a compact disc recording of Dorff's most prominent works for flute: April Whirlwind, 9 Walks Down 7th Avenue, both for flute and piano, and Nocturne Caprice for solo flute. In support of this recording, the study also provides biographical information regarding Daniel Dorff, discusses his compositional methods and ideology, and presents background information, description, and performance notes for each piece. Interviews with Daniel Dorff regarding biographical and compositional details serve as the primary source for this document. Suggestions for the performance of the three flute works were gathered through interviews with prominent flutists who have studied and performed Dorff's pieces. Additional performance suggestions for Nocturne Caprice were gathered through a coaching session between the author and the composer. This project is meant to promote the flute works of Daniel Dorff and to help establish their role in the standard flute repertory.
ContributorsRich, Angela Marie (Contributor) / Novak, Gail (Pianist) (Performer) / Buck, Elizabeth Y (Thesis advisor) / Hill, Gary W. (Committee member) / Holbrook, Amy (Committee member) / Schuring, Martin (Committee member) / Arizona State University (Publisher)
Created2010
Description
Our group has constructed a ring-imaging Cherenkov (RICH) detector with the goal of testing the performance of aerogel tiles in charged particle detectors. In previous work, tiles produced by Aspen Aerogels were tested as radiators in Cherenkov threshold counters and compared to commercial-grade samples. As an extension of this work we built a counter of the RICH type, which is used in practice to extract more particle identification information than threshold counters, and we have studied the images resulting from various aerogel samples.
The detector was designed for use in table-top experiments in which our particle source would be cosmic rays. Due to the vast energy range of cosmic rays, the window in which we can discriminate velocities is relatively small. Since the particles we do detect generally have β≈1, the relativistic limit β→1 motivates imaging by the Focusing Aerogel RICH (FARICH) technique, in which photons from multiple tiles are focused together at a detection plane.
Our detection plane is an array of flat-panel, multi-anode photomultiplier tubes (PMTs). Readout consists of multiplexing the anode outputs, recording the digitized signal, and converting this into a matrix of integrated charge values. The charge distribution in that matrix should directly imply the particle's speed; however, in practice, final recorded images are the influenced by many intermediate processes, so we have attempted to make meaningful measurements by averaging over numerous events.
For a given configuration and data collection, we produce the spatial distribution of observed signals relative to the cosmic ray's point of impact. These distributions have the expected form of a ring and their characteristics compare favorably with the predictions of geometric optics. Our confidence in the images is increased by verifying that changes to the configuration are reflected by the changes in the rings. We find that FARICH improves the sharpness of our ring images, but tiles must be used individually for actual aerogel analysis. So far we have shown that the Aspen tiles behave as one would expect for the purposes of RICH. Their images do resemble those produced by commercial-grade tiles, but we do not have tiles sufficiently similar for side-by-side comparison. A method of quantifying tile performance has proven difficult and is the only remaining task for our group.
The detector was designed for use in table-top experiments in which our particle source would be cosmic rays. Due to the vast energy range of cosmic rays, the window in which we can discriminate velocities is relatively small. Since the particles we do detect generally have β≈1, the relativistic limit β→1 motivates imaging by the Focusing Aerogel RICH (FARICH) technique, in which photons from multiple tiles are focused together at a detection plane.
Our detection plane is an array of flat-panel, multi-anode photomultiplier tubes (PMTs). Readout consists of multiplexing the anode outputs, recording the digitized signal, and converting this into a matrix of integrated charge values. The charge distribution in that matrix should directly imply the particle's speed; however, in practice, final recorded images are the influenced by many intermediate processes, so we have attempted to make meaningful measurements by averaging over numerous events.
For a given configuration and data collection, we produce the spatial distribution of observed signals relative to the cosmic ray's point of impact. These distributions have the expected form of a ring and their characteristics compare favorably with the predictions of geometric optics. Our confidence in the images is increased by verifying that changes to the configuration are reflected by the changes in the rings. We find that FARICH improves the sharpness of our ring images, but tiles must be used individually for actual aerogel analysis. So far we have shown that the Aspen tiles behave as one would expect for the purposes of RICH. Their images do resemble those produced by commercial-grade tiles, but we do not have tiles sufficiently similar for side-by-side comparison. A method of quantifying tile performance has proven difficult and is the only remaining task for our group.
ContributorsStryker, Jesse R. (Author) / Alarcon, Ricardo (Thesis director) / Schmidt, kevin E. (Committee member) / Barrett, The Honors College (Contributor)
Created2014-05