1 / 10

Biagio Rossi – PhD Student LHEP, University of Bern

Analysis of capillary target Report on LN-TPC design hardware and schedule of next activities. Biagio Rossi – PhD Student LHEP, University of Bern. LHEP-CRYO Meeting, Bern, 9 January 2007. Analysis of capillary target. People involved:

vilmos
Download Presentation

Biagio Rossi – PhD Student LHEP, University of Bern

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Analysis of capillary target • Report on LN-TPC design hardware and schedule of next activities Biagio Rossi – PhD Student LHEP, University of Bern LHEP-CRYO Meeting, Bern, 9 January 2007

  2. Analysis of capillary target People involved: A. Ereditato - I. Kreslo - B. Rossi – H. U. Schutz and SOREQ Biagio Rossi - LHEP-CRYO Meeting - Bern University - 9th Jan 2007

  3. Pattern recognition of Capillary bundles • November 06: AGREEMENT between SOREQ-LHEP • December 06: Preliminary tests of capillaries, using gamma and neutron sources. • Genaury 07: Developing SW for analysis. • Febraury 07: Preliminary Analysis. • March 07: Test beam in Germany Detector geometry: Shape: Cilindrical (5mm radius glass capillaries embedded) Radius: 0.7 cm - Lenght: 10 cm A picture of the detector during some tests with radioactive sources Biagio Rossi - LHEP-CRYO Meeting - Bern University - 9th Jan 2007

  4. Display of events Event with a Pu source (neutron source) • ITEMS: • Pedestal background subtraction for every pixel • Active surface determination ( with a very near Cs g-ray source ) • Automatic Recostruction (by SW) of the “active surface” • Data analysis • BACKGROUND SOURCES: • Isolated electrons extracted inside “Image Intensifier” (expecially for electrons) • Isolated Ions extracted inside “Image Intensifier” (expecially for protons) • PRELIMINARY “BLIND ANALYSIS” ON NEUTRON EVENTS • Proton tracks are more easy to characterize respect to electrons • Direction of the TRACKs Biagio Rossi - LHEP-CRYO Meeting - Bern University - 9th Jan 2007

  5. What’s the idea • Energy distribution of all the point of the matrix without cut • Put High_thresohld = <energy> + 3s and Low_thresohld = <energy> + 1s • Search for HIT ( points of matrix A(i,j) >high_threshold ) • Search for CLUSTER ( two or more “NEAR” HITs ) – • i.e. A(3,3) is an HIT -> check if in the CELL (3x3 matrix centered in the point A(3,3) ) there are other HITs. • If NOT do the Sum of the values of the CELL that are greater than low_threshold. • If YES starts the recoursive analysis, searching for other HITs in the CELL centered in the LAST found HIT and so on until it doesen’t find an HIT in the neighborhood CELLs. When the recoursive serching stops, do the Sum of the values of all the pixels in all the CELLs that are greater than low_threshold. Biagio Rossi - LHEP-CRYO Meeting - Bern University - 9th Jan 2007

  6. Software code int XMIN, XMAX, YMIN, YMAX; //---- Limits of the matrix of data int Sum = 0; int c = 0; loop YMIN,YMAX (index i) //---- loop COL of A(i,j) – Matrix of data loop XMIN, XMAX (index j) //---- loop on ROW of A(i,j) – Matrix of data if ( A( i ,j ) > high_threshold && B( i , j == 0 ); B( i ,j ) == 0; Sum = 0; c = 0; Clustering_Func(&A, &B, i, j, &Sum, &c); Energy_distribution->Fill(Sum); if (c == 0) …… . . . . . . . …. RECOURSIVE FUNCTION void Clustering_Func(int*A[i,j],int* B[m,n],int i,int j,int* Sum,int* c) loop i-1, i+1 ( index k ) loop j-1, j+1 ( index l ) if ( k <= XMIN || k >= XMAX || j <= YMIN || j >= YMAX) if( !B(k,l) ) if( A(k,l) > low_threshold ) Sum = Sum + A(k,l); B(k,l) = 1; C(k,l) = A(k,l); if( A(k,l) > high_threshold ) c = 1; Clustering_Func(&A, &B, k, l, &Sum, &c) endif endif endif endif end loop ( indexl ) end loop ( indexk ) Biagio Rossi - LHEP-CRYO Meeting - Bern University - 9th Jan 2007

  7. Report on LN-TPC design hardware and schedule of next activities People involved: A. Ereditato - M. Hess - S. Janos – I. Kreslo - M. Messina - U. Moser - B. Rossi – H. U. Schutz Biagio Rossi - LHEP-CRYO Meeting - Bern University - 9th Jan 2007

  8. Status of activities LN-TPC • Dewar • TPC • New wire plane (10 wires - wire’s diameter 125 mm – wire’s pitch 2mm) • “BIG Flange” • “Feedthrough Flanges” • Vacuum pumps (Rotative and Turbo) • HV supply and signal feedthrough • Analogic Front End board (4 amplifier = we can read 4 wires contemporary ) Biagio Rossi - LHEP-CRYO Meeting - Bern University - 9th Jan 2007

  9. Schedule of next activities • HV feedthrough - end of JAN ? • “Feedthrough flange holes” and “knit feedthrough flange” – end of JAN ? • Design and Build the support for the radioactive source – design for half of FEB • Cleaning and Assembly TPC – a week before the first vacuum test • Build support for TPC – a week before the first vacuum test • Dewar for Filter – To buy or we have it ? • Levelmeter ( PT100 ? ) – ? ? ? • OXYSORB filter –see Marcello Messina talk • Proposal scheme for Direct Filtering –see next slide Biagio Rossi - LHEP-CRYO Meeting - Bern University - 9th Jan 2007

  10. Proposal scheme for Direct Filtering TPC dewar Oxysorb Pure LN tank LN tank Vacuum pump LN Biagio Rossi - LHEP-CRYO Meeting - Bern University - 9th Jan 2007

More Related