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(Princeton University)

Princeton University is a private research university located in Princeton, New Jersey, United States. The school is one of the eight universities of the Ivy League, and is one of the nine Colonial Colleges founded before the American Revolution. Princeton provides undergraduate and graduate instruction in the humanities, social sciences, natural sciences, and engineering. Princeton does not offer professional schooling generally, but it does offer professional master's degrees (mostly through the Woodrow Wilson School of Public and International Affairs) and doctoral programs.

More information: http://en.wikipedia.org/wiki/Princeton_University

Double enclosed SS - Hg loop with windows Remote controlled Laser optics and high speed video recording Solenoid magnet with 15 cm warm bore 24 GeV proton beam 20-50 pulses dc Hg pump, ~ 25 kg/s P-beam window Beam position -profile monitor 2 movable + 2 fixed mirrors Hg sump

2cm bore / outer confinement Mirror 1 Mirror 2 Jet chamber Hg supply

6000 l Dewar Access Route Two 18 kV sub-stations One 18 kV Sub-station

von Mises stress due to the Lorentz forces during 15-T operation. The 15-T magnet in its cryostat, January 2006, at CVIP, Emmaus, PA. Calculated behavior of the 15-T magnet during a pulse. The peak current is 7200 A at a peak voltage of 700 V. Approximately 30 MJ of energy is dissipated in the magnet, which raises its temperature from 80 to 120 K. The MERIT experiment, which ran at CERN in 2007, is a proof-of-principle test for a target system that converts a 4-MW proton beam into a high-intensity muon beam for either a neutrino factory complex or a muon collider. The target system is based on a free mercury jet that intercepts an intense proton beam inside a 15-T solenoid magnetic. Here, we describe the design and initial performance of the 15-T, liquid-nitrogen-precooled, copper solenoid magnet. Longitudinal cross section of the 15-T pulsed magnet, showing the 3 coil packages and cryostat A 15-T PULSED SOLENOID FOR A HIGH-POWER TARGET EXPERIMENT H.G. Kirk, BNL, Upton, NY 11973, USA Efthymiopoulos, A. Fabich, F. Haug, H. Pereira, CERN, CH-1211 Genéve 23, Switzerland P. Titus, MIT/PSFC, Cambridge, MA 02139, USA K.T. McDonald, Princeton University, Princeton, NJ 08544, USA J.R.J. Bennett, CCLRC, RAL, Chilton, OX11 0QX, UK The inner coil, at completion of winding at Everson-Tesla, Allentown, PA. Model of the cooldown by LN2 over 20 min of 40 K temperature rise of a 15-T magnet pulse. The nested set of 3 coil segments. The axial and circumfe...

Concept of a continuous mercury jet target for an intense proton beam. The jet is tilted by 100mrad with respect to a 20-T solenoid magnet that conducts low-momentum pions into a decay channel. The beam/jet angle is ~30mrad. Above : The major cost driver of the target system is the civil construction of the target vault – with hot cells and remote handling manipulators. Above: Energy deposition in the superconducting magnet and the tungsten-carbide shield inside them. Approximately 2.4 MW must be dissipated in the shield. Above: A major challenge is incorporation of the proton beam dump Inside the superconducting magnet cryostat. The mercury collection pool can serve as this dump. High-Power Targets for a Neutrino Factory While the principle of a liquid-metal jet target inside a 20-T solenoid has been validated by the MERIT experiment for beam pulses equivalent to 4-MW beam power at 50 Hz, substantial effort is still required to turn this concept into a viable engineering design. We are embarking on a multi-year program of simulation and technical design for a 4-MW target station under auspices of the International Design Study for a Neutrino Factory. Above: Baseline Parameters for the target system. H.G. Kirk,* BNL, Upton, NY 11973, USA X. Ding, UCLA, Los Angeles, CA 90095, USA V.B. Graves, ORNL, Oak Ridge, TN 37831, USA K.T. McDonald, Princeton University, Princeton, NJ 08544, USA C.J. Densham, P. Loveridge, RAL, Chilton, OX11 0QX, UK F. Ladeinde, Y. Zhan ,...

Above: Energy deposition in the superconducting magnet and the tungsten-carbide shield inside them. Approximately 2.4 MW must be dissipated in the shield. See also THPEC092. Above: A major challenge is incorporation of the proton beam dump Inside the superconducting magnet cryostat. The mercury collection pool can serve as this dump. A 4-MW TARGET STATION FOR A MUON COLLIDER OR NEUTRINO FACTORY (WEPE101, IPAC10) While the principle of a liquid-metal jet target inside a 20-T solenoid has been validated by the MERIT experiment (WEPE101) for beam pulses equivalent to 4-MW beam power at 50 Hz, substantial effort is still required to turn this concept into a viable engineering design. We are embarking on a several-year program of simulation and technical design for a 4-MW target station in preparation for the Muon Collider Design Feasibility Study and the International Design Study for a Neutrino Factory. Above: Baseline Parameters for the target system. Concept of a continuous mercury jet target for an intense proton beam. The jet and beam are tilted by ~ 100 mrad and ~ 70 mrad, respectively, with respect to a 20-T solenoid magnet that conducts low-momentum pions into a decay channel. H.G. Kirk,* BNL, Upton, NY 11973, USA X. Ding, UCLA, Los Angeles, CA 90095, USA V.B. Graves, ORNL, Oak Ridge, TN 37831, USA K.T. McDonald, Princeton University, Princeton, NJ 08544, USA C.J. Densham, P. Loveridge, RAL, Chilton, OX11 0QX, UK F. Ladeinde, Y. Zhan , SUNY Stony Brook, S...

1. Locate one orange fiber shown here in one of the optic box (it is 15 meter long). 2. Locate the fiber checker like this one, a red laser pointer, in one of the optic box switch #1 switch #2 3. Turn on the laser by pushing switch #1 once immediately followed by switch #2 once. (the turn on sequence is a little tricky) Procedures for checking the integrity of the illumination and imaging fibers 4. Couple one end of the orange fiber into the fiber checker by inserting the SMA connector into the ferule of the fiber checker. (the coupling is not quite a tight fit, so it’s best let them sit on a flat surface so they won’t move) 5. Couple the other end of the orange fiber into the #1 illumination input port shown here. 6. It’s not necessary to uncoil any (black) imaging fibers from the spool but rather locate all output ends on the spool labeled #1 to #4. 7. Confirm that light exit imaging fiber #1 using a white paper shown here 8. If the illumination and imaging channel is in good shape, strong red light should be observed, otherwise the fiber might have been broke or optics have been shifted. 9. Repeat the process on fiber #2 to #4 April 2, 2007

Cutaway view of the MERIT experiment. The solenoid/Hg jet system is tilted by 100~mrad with respect to the beam/floor. The 15-T magnet is cooled by LN2 and can be pulsed every 30 min. The Hg jet is 1-cm in diameter and has a velocity of 20 m/s, which presents a new, 2-interaction-length target to the beam every 20 ms. Concept of a continuous mercury jet target for an intense proton beam. The jet and beam are tilted by 100~mrad and 67~mrad, respectively, with respect to a 20-T solenoid magnet that conducts low-momentum pions into a decay channel. The MERIT Experiment, which ran at CERN in 2007, is a proof-of-principle test for a target system that converts a 4-MW proton beam into a high-intensity muon beam for either a neutrino factory complex or a muon collider. The target system is based on a free mercury jet that intercepts an intense proton beam inside a 15-T solenoidal magnet. THE MERIT HIGH-POWER TARGET EXPERIMENT AT THE CERN PS H.G. Kirk, T. Tsang, BNL, Upton, NY 11973, USA I. Efthymiopoulos, A. Fabich, F. Haug, J. Lettry, M. Palm, H. Pereira, CERN, CH-1211 Genéve 23, Switzerland N. Mokhov, S. Striganov, FNAL, Batavia, IL, 60510, USA A.J. Carroll, V.B. Graves, P.T. Spampinato, ORNL, Oak Ridge, TN 37831, USA K.T. McDonald, Princeton University, Princeton, NJ 08544, USA J.R.J. Bennett, O. Caretta, P. Loveridge, CCLRC, RAL, Chilton, OX11 0QX, UK H.-J. Park, SUNY at Stony Brook, NY 11794, USA A 1-cm diameter, 15-m/s Hg jet at 0, 75, 175, and 375 s a...

Cutaway view of the MERIT experiment. The solenoid/Hg jet system is tilted by 100~mrad with respect to the beam/floor. The 15-T magnet is cooled by LN2 and can be pulsed every 30 min. The Hg jet is 1-cm in diameter and has a velocity of 20 m/s, which presents a new, 2-interaction-length target to the beam every 20 ms. Concept of a continuous mercury jet target for an intense proton beam. The jet and beam are tilted by 100~mrad and 67~mrad, respectively, with respect to a 20-T solenoid magnet that conducts low-momentum pions into a decay channel. The MERIT experiment, to be run at CERN in 2007, is a proof-of-principle test for a target system that converts a 4-MW proton beam into a high-intensity muon beam for either a neutrino factory complex or a muon collider. The target system is based on a free mercury jet that intercepts an intense proton beam inside a 15-T solenoidal magnetic. A HIGH-POWER TARGET EXPERIMENT AT THE CERN PS H.G. Kirk, H.-J. Park, T. Tsang, BNL, Upton, NY 11973, USA I. Efthymiopoulos, A. Fabich, F. Haug, J. Lettry, M. Palm, CERN, CH-1211 Genéve 23, Switzerland N. Mokhov, S. Striganov, FNAL, Batavia, IL, 60510, USA A. Carroll, V.B. Graves, P.T. Spampinato, ORNL, Oak Ridge, TN 37831, USA K.T. McDonald, Princeton University, Princeton, NJ 08544, USA J.R.J. Bennett, O. Cannetta, P. Loveridge, CCLRC, RAL, Chilton, OX11 0QX, UK Past studies: A 1-cm-diameter, 2.5-m/s Hg jet at 0, 0.75, 10, and 18~ms after interaction with 3.8 x 1012 24-G...

Schematic Diagram of Experimental Setup in Optical Diagnostics H-J Park (Nov 8, 2006)

Section view of current target Upgrade to ISIS target station 1 Section view of target concept 800MeV, 160kW, 50Hz 90kW heat removed in water Target being in pellet form allows high temp operation without high stresses No cooling water to moderate neutron flux Scope for more than 160kW? Ref: Sievers 2003. A A Section AA High temperature tungsten pellets Helium cooling

Cutaway view of the MERIT experiment. The solenoid/Hg jet system was tilted by 67mrad with respect to the beam/floor. The 15-T magnet was cooled by LN2 and can be pulsed every 30 min. The hydraulic injection system was capable of delivering an Hg jet of 1-cm in diameter with a velocity up to 20 m/s. Details of the primary containment with the optical diagnostic system. The Hg jet was viewed as it streamed by viewports 1, 2, 3, and 4. The jet and beam axis overlapped at viewport 2, while the aftermath of the interaction was viewed at viewports 3 and 4. The MERIT experiment, which ran at CERN in 2007, was a proof-of-principle test for a target system that converts a 4-MW proton beam into a high-intensity muon beam for either a Neutrino Factory complex or a Muon Collider. The target system is based on a free mercury jet that intercepts an intense proton beam inside a 15-T solenoid magnet. OPTICAL DIAGNOSTIC RESULTS FROM THE MERIT HIGH-POWER TARGET EXPERIMENT H.G. Kirk, H. Park, T. Tsang, BNL, Upton, NY 11973, U.S.A. I. Efthymiopoulos, A. Fabich, F. Haug, J. Lettry, M. Palm, CERN, CH-1211 Genève 23, Switzerland N. Mokhov, S. Striganov, FNAL, Batavia, IL, 60510, U.S.A. A. Carroll, V.B. Graves, P.T. Spampinato, ORNL, Oak Ridge, TN 37831, U.S.A. K.T. McDonald, Princeton University, Princeton, NJ 08544, U.S.A. J.R.J. Bennett, O. Caretta, P. Loveridge, CCLRC, RAL, Chilton, OX11 0QX, U.K. A proton beam/jet interaction as viewed in viewport 3: Left image is befor...

RF Bucket Area Introduction Intense muon beams have many potential applications, including neutrino factories and muon colliders. However, muons are produced as tertiary beams, resulting in diffuse phase space distributions. To make useful beams, the muons must be rapidly cooled before they decay. An idea conceived recently for the collection and cooling of muon beams is the Quasi-Isochronous Helical Cooling Channel (QIHCC), which takes advantage of the larger RF buckets for particles traveling in nearly isochronous orbits. The QIHCC also offers a natural match into the HCC, which is recognized as the most efficient cooling scheme for a neutrino factory or muon collider. Matching Section Figure 6: Design parameters in matching section. Accelerating phase φs designed to maintain constant momentum of 237 MeV/c Figure 7: Momentum (MeV/c) vs. z (mm) for μ−’s and π−’s at exit of the matching section. Muons & Pions in the Straight Solenoids Figure 2: Momentum (MeV/c; vertical) vs. time (nsec; horizontal) for μ−’s and π−’s out of tapered solenoid. Figure 3: Momentum (MeV/c) vs. time (nsec) for μ−’s and π−’s after the first straight in vacuum. Figure 4: Momentum (MeV/c) vs. z (mm) for μ−’s and π−’s at the particle’s creation. Figure 5: Momentum (MeV/c) vs. z (mm) for μ−’s and π−’s at exit of the second straight and entrance of the matching section. Future The present st...

Shelving & Annexes Section (8-3372 / B-13-F) * S. Dennis (8-3225 / B-10-C2) L. Curbishley J. Rockey K. Wang D. Lam T. Torh L. Yao P. Paccione Forrestal Annex (8-3260) W. Aparin Fine Hall Annex (8-4529) N. Ealer Approvals Coordinator (8-1597 / 1-9-G) * B. Black TECHNICAL SERVICES DEPARTMENT CIRCULATION DIVISION R. Schulz (Acting Head) (8-5297/1-13-H) J. Martine (Chief Liaison) (8-3244/1-10-F) Reserve / General Periodicals Services (8-3224 / A-6-H) *M. Wange-Connelly, Acting Head (8-3231 / A-7-H) K. Bowden Y. Fan J. Shovlin L. Cerbone N. Owens D. Willitts V. Collins A. Pulido Firestone Circulation Services (8-3202 / 1-9-E) *J. Martine / (8-3244 / 1-10-F) **K. Boomhower C. Hunter S. Brown M.Siravo C. Cerullo D. Vuong D. Grant Serial Acquisitions Unit (8-5415 / 1-9-G) * H. Fisher J. Cruz E. Kativa M. Wieland A. Dickey B. Logan Continuations Section (8-6010 / 1-9-G) *S. Hajdas-Sikorski D. Dittrick A. Tepavitcharov M. Vesali ORDER DIVISION @ K. Farrell (8-3192 / 1-13-G1) Cataloging Unit II (8-5166 / 1-9-H) * Rex Hatfield, Acting Head (8-1373) S. Dasgupta R. Reed N. Smukler D. Follansbee N. Sibio D. Snead A. Kelly S. Sisson Cataloging Unit I (8-5681 / 1-9-H) * # J. Luttrell J. Bahbah P. Gibney H. Sullivan M. Cheema G. Kam J. ...

Powder experiments update Achieved a dense and coherent semi-cylindrical Jet: estimated 42% +-5% v/v. I.E. ~8000 kg/m^3. With a 20mm diameter nozzle and over a 30 cm long jet. Little erosion on dense phase conveying components: the glass components did not scratch yet Moving components were removed from the proximity of the beam line Consistent dune flow was achieved in a pipe: flow restarts even with a packed nozzle Image analysis on the H.S. video of the jet is in progress So far, the plant conveyed reliably 4.5 tonne of tungsten powder Unstable tungsten powder jet Particle Image Velocimetry applied to the jet Image analysis: average jet High speed image: tungsten powder jet High speed image: tungsten powder flow in a pipe O.Caretta, P.Loveridge and C.J.Densham (October 6, 2009)
Career Information Resources From the Princeton University Library

Career Information Resources From the Princeton University Library

Finding Data for Sociologists at Princeton University

Sociology Incoming PhD Students Data Resources at Princeton University
Internet Routing (COS 598A) Today: Interdomain Topology Jennifer Rexford http://www.cs.princeton.edu/~jrex/teaching/spring2005 Tuesdays/Thursdays 11:00am-12:20pm

Internet Routing (COS 598A) Today: Interdomain Topology Jennifer Rexford http://www.cs.princeton.edu/~jrex/teaching/spring2005 Tuesdays/Thursdays 11:00am-12:20pm
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