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Dernière mise à jour : jeudi 17 octobre 2013, par
The project goal is to obtain prototype ladders matching reasonably well the ILC requirements for the vertex detector. These ladders should be equipped with CMOS pixel sensors on both sides (double-layer ladder) with a material budget around 0.3 % of X0.
Three institutes collaborate to the project : DESY, IPHC, the University of Bristol. The project benefits from the help (components and information) of the Institüt of Kernphysik and Goethe University in Frankfurt which is pursuing similar goal. During the first years of the project, the University of Oxford was also a member of the collaboration.
To reference our work, please use :
A.Nomerotski et al., "PLUME collaboration : Ultra-light ladders for linear collider vertex detector", Nucl.Instr.Meth. A650 (2011) 208-212.
Or link this page http://www.iphc.cnrs.fr/PLUME.
Please, also consult our Document section.
We are using a mailing list,
you can also mail to Jerome Baudot who will forward your request to the list.
Meetings (consult the indico site for minutes and slides)
- General meeting at CERN, 2012 November 20-21 : indico
- Monthly phone meeting, 2012 January 11 : indico
- General meeting at CERN, 2011 June 9-10 : indico
- Monthly phone meeting, 2011 May 03 : indico
- Monthly phone meeting, 2011 January 28 : indico
- Monthly phone meeting, 2010 November : Friday 26, Tuesday 30
- Monthly phone meeting, 2010 October 27 : indico
- General meeting at CERN, 2010 June 18 : indico
- Monthly phone call, 2010 May 4 : indico
- Monthly phone call, 2010 April 6 : indico
- Monthly phone call, 2010 February 26 : indico
- Monthly phone call, 2010 January 12 : indico
- First general meeting at CERN, 2009 December 4th : indico
- Presentation by Ingrid at the LC Forum, 9-11 October 2013 at DESY : "Ultra-light double-sided ladders for a LC detector" slides.
- Poster by Oleg at VCI, 11-15 February 2013 in Vienna : "Power pulsing of the CMOS sensor Mimosa 26" poster.
- Presentation by Marc and Jerome at LCWS 2011 : "Development of Single- and Double-sided Ladders for the ILD Vertex Detectors" proc, ArXiv 1203.3689.
- Material budget estimate pdf.
- Summary of first batch of simulations (thermal and mechanical) by Franziska pdf
- Presentation by Ingrid at IWLC 2010 : "Ultra-light double-sided ladders for a LC vertex detector" pdf
- Presentation by Andrei at PIXEL 2010 : "Ultra-light Ladders for LC Vertex
- Presentation by Nathalie at LCWS 2010 : "Development of ultralight
pixelated ladders for an ILC vertex detector" pdf, ArXiv 1006.5424.
- The first document describing the project goals and initial steps are available here : pdf.
- 2013 :
- production of new ladder with 0.35% X0 to start at the end of the year.
- Finalization of the beam test data analysis.
- flex (standard and mirror) are in production with aluminum metal.
- mirror flex have been produced with copper, validated under simple tests.
- 2012 : We have pursued the characterization of the produced ladders and started the new flex production.
- First samples of the new flex design with copper metal were produced and electrical test were positive. This new design require a mirror flex to equip the other side of the ladder, this mirror flex was also designed.
- Analysis of the test beam data.
Due to a new career orientation, we lost our Oxford partner.
- 2011 : We have been driving in parallel the assembly and (lab and beam) testing of the ladder from the 2010 design and the preparation of the new (2011) design to optimize the material budget.
- In total, 5 modules from the 2010 design were produced, all functional. The first ladder was assembled in June, see picture and is also functional. A second one is foreseen for September. The thermal and mechanical behavior of the ladder under air cooling is being studied through simulations and measurements (mechanical survey, thermal mockup).
- A new (2011 design) flex cable has been designed, narrower and using aluminum. It should allow to reach a material budget of 0.34% of X0 for the double-sided ladder.
- We performed beam tests at CERN-SPS from October 31 to November 6 with two complete ladders : that was a 10 Mpixels experiment, including the reference telescope.
- 2010 : The second prototype (2010 design) reaches already the full size (sensitive area 13x1 cm2). Each module is equipped with 6 MIMOSA 26 sensors (18.4 µm pitch, 100 µs readout). The ladder backbone is made of 1mm of silicon carbide foam at 8%. This design is mostly focussed on the electric functionality and not yet on the material budget, which amounts to 0.6% of X0 for the double-sided ladder.
Several modules were assembled and successfully tested, see picture. A long characterization work was conducted to evaluate the robustness of the module design with respect to the operation of 6 sensors all together.
Simulations based on finite element analysis were started to understand the thermal and mechanical behavior of the ladder.
- 2009 : The first ladder prototype (2009 design) uses MIMOSA20 sensors, 1x2 cm2 with analog readout. It is already a double-sided ladder made of 2 modules mounted on each side of a silicon carbide foam. A module contains two sensors. The material budget amounts to 0.6 % X0.
Two ladders were fabricated and one was tested in the CERN-SPS beam in November. (see picture
- First ladder (2010 design) equipped with 12 Mimosa 26 sensors jpg
- First ladder (2010 design) equipped with dummy sensors jpg, jpg
- First module (2010 design) equipped with 6 sensors gif
- Ladder concept for 2010 jpg, within supporting box jpg AND the real object jpg
- PCB-flex2010 model equipped with 3 sensors jpg
- Flex 2010 design : by Graphic, by Optiprint
- Module 2010 with mechanical (smaller) sensors jpg
- Module assembly tool jpg
- ladder 2009 jpg
- ladder concept sketch jpg
Alignment Investigation Device : AIDBox
- Proposed measurement program with the AIDBox : pdf