PowerPoint Presentation

LPROT preliminary dataTE/MPE/PEEN/STIEN/MMEHistory>8 yr ago. Simulations from N. Tahir and CERN pointed that a tunneling process happens when a high-intense high-dense beam interacts with matter. Verena & Rdiger experiment at SPS.Couple of years ago, SPS experiment idea.Last year, HiRadMat facility experiment request.

SPS material test3

Four intensities [SPS-beam type @ 450 GeV 1.1x0.6mm sigma]: A=1.3x1012, B=2.6x1012, C=5.3x1012, D=7.9x1012Verena Kain (2005)Zinc, stainless steel, copper and INCONEL

11121617Cu plates (simulations predicts plate 18th 1st to melt)The experiment confirms the 5% (2.3e12 p) equipment damage level @ 450GeVPressure evolution (0.5mm)

5Location of HiRadMat

6Layout of Experimental Area

Flexible optics to provide beam radii of s = 0.1 to 2.0 mm at the focal points.Focal point longitudinal location continuously variable between positions 1 and 3.Predefined optics for 3 focal points and 6 beam sizes.BTVLargetest objectSmalltest objectsExperiment

ExperimentTarget assembly done in collaboration with EN/STIDiamond detectors + associated electronics, designed specifically for this experiment in collaboration with EG (Erich Griesmayer)Strain gauges in collaboration with EN/MMEInstallation

Installation

Phase I (22-Jun/6-Jul), Beam summary71 low intensity single bunch shots (2E9-1E10 p+)85 high intensity single bunch shots (1E11-2E11 p+)8 high intensity multi-bunch shots (1.5E11 p+)

Diamond detector signal

1 bunch low intensity20dB attenuationMagenta = first diamond detector (z=40cm)Green = second diamond detector (z=50cm)Blue = third diamond detector (z=120cm)

Diamond detector linearity

Detector signal versus beam intensityDiamond detector linearityDiamond detectors have a good linearity for a wide intensity range. Tested different bias voltage across the detectors and its influence on the signal.Other characteristics also understood and in process of understanding.

Diamond FWHM

Multi-bunch

6 bunches40 dB attenuationIntensity=8.47E11p+

Multi-bunch

1.9E11p+ per bunch, 6 bunches.Multi-bunch

12 bunches40 dB attenuationIntensity=8.32E11p+

Multi-bunch

~1.9E11p+ per bunch, 12 bunches.Multi-bunchOffset after second bunch of 50mV. Coming from electronics.No signal pile-up.No offset pile-up.Diamond signal linear for every bunch.

Photographic paper

Photographic paper

Photographic paper

Photographic paper

Strain Gauges

SEM detectors

SEM detectors

Microphones

Microphones

Microphones

Microphones

Target 3Single bunch 4.5E10 protonsBeam soundConclusionWe were ready for phase II.

Refine beam pulse list for phase II (Tuesday 10-July)Beam Pulse ListNoIntensityBeam spot [mm]Bunch spacing [ns]Pulse length [us]# bunchesp/bunchTotalSigma_xSigma_y2261441.50E+112.16E+132250target 12271081.50E+111.62E+130.20.250target 22281441.50E+112.16E+130.20.250target 3Phase II (12-July-2012)

Target 1: 2mm sigma beam (no tunneling expected) -> base shot

Target 3: 0.2mm sigma beam -> tunneling expected

Simulations4th block5th block12th blockSimulations: different beam size, beam intensity, Nbunches, bunch spacing.Analysis of the dataAnalyze and correct the data from the instrumentationUpdate simulations with experiment parametersVisual inspection of the targetCompare: simulations / data from experiment / visual inspectionPRELIMINARY DATA/INTERPRETATIONFROMHIRADMAT EXPERIMENT1. Raw signal

Target 1 144 bunches

Target 3 144 bunchesMicrophones

Target 3Single bunch 4.5E10 protonsBeam sound

Target 3Single bunch 144 bunches 1.5E11 protons/bunchBeam soundDiamond Detectors Background

Diamond 1, target 1,3

Diamond 2, target 1 vs 3

Diamond 3, target 1 vs 31.A (target 1 target 3 signal)

Diamond 1, target 1 target 3

Diamond 2, target 1 target 3

Diamond 3, target 1 target 31. B. Correction by amplitude

1. C. Correction by charge

1.D. Proper correction (in progress)For target 1:Calculate the V for each bunch.Ratio between signal bunch(x)/bunch(3)Ration between FWHM bunch(x)/bunch(3)

For target 3:Calculate the V for each bunch.Look the correction coefficient from calibration in target 1.Look for the FWHM correction from calibration in target 1.3. Update simulations with experiment parameters (not yet started)3. Post-Irradiation Analysis (not yet started)After 3-4 months of cooling.Open the target and visually inspect it.Measure activation profile on the targetsIf activation is acceptable, take some samples to a lab and perform: Xrays or Ultrasounds.During this 3-4 months update simulations (FLUKA-BIG2) with updated beam parameters.Compare results with diamond signal and with updated simulations.Opening for inspection

Opening for inspection

Opening for inspection

FutureContinue to experiment and understand diamond detectors -> new little experimentsFurther analyze experiment dataExpand the application of diamond detectorsPossibly prepare more complete/complex experiments

Au

Au

C (diamond)

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