1 / 9

LHC Screen Profile Monitors G. Ferioli , R. Jung

LHC Screen Profile Monitors G. Ferioli , R. Jung. Introduction BTV LHC layout Monitor set-up Characteristics Data processing Conclusion. Introduction. In the transfer channels of the SPS the main use of the screen monitors BTV was to observe qualitatively the beam position and shape.

vivien-william
Download Presentation

LHC Screen Profile Monitors G. Ferioli , R. Jung

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. LHC Screen Profile MonitorsG. Ferioli, R. Jung Introduction BTV LHC layout Monitor set-up Characteristics Data processing Conclusion G. Ferioli, R. Jung - LHC-BI Review Workshop November 19&20

  2. Introduction • In the transfer channels of the SPS the main use of the screen monitors BTV was to observe qualitatively the beam position and shape. • To perform profile measurements Secondary Emission Grids were used with a spatial resolution between 0.8 and 5 mm and a total number of 16 or 32 channels.  • In order to cope with the characteristics of the LHC beams a large number of channels and a high spatial resolution are required.  • With the use of different screen materials, image acquisition and processing software, the TV screens can be used for precision profile measurements. G. Ferioli, R. Jung - LHC-BI Review Workshop November 19&20

  3. BTV LHC layout G. Ferioli, R. Jung - LHC-BI Review Workshop November 19&20

  4. Monitorset-up Schematic view of the monitor set-up Monitor set-up G. Ferioli, R. Jung - LHC-BI Review Workshop November 19&20

  5. Main Characteristics Beams : Intensity  min 5*109p pilot pulse max 3.7*1013 p 3 batches ultimate Dimensions min 0.35 mm 1 sigma hor/vert max 1.7 mm Screens :Material Thickness Profile 3*3mm2Light source Al2O3(Cr) 1mm >108p Luminescence Titanium 12µm >1011p OTR Carbon 100µm >1012 p OTR Detector : CCD camera 390 (hor) *290 (vert) pixels Multi-Anode PM 32 stripes (H or V)  Optics: Focal length Image area Sampling 35 mm 38*28 mm2 97 µm/pixel 50 mm 25*18 mm2 64 µm/pixel 75 mm 15*11 mm2 38 µm/pixel G. Ferioli, R. Jung - LHC-BI Review Workshop November 19&20

  6. TV data processing Single bunch LHC 5*109 p in TT10 2-D view Horizontal and vertical profile 3-D view G. Ferioli, R. Jung - LHC-BI Review Workshop November 19&20

  7. Turn-by-turn image processing for Matching G. Ferioli, R. Jung - LHC-BI Review Workshop November 19&20

  8. Fast data processing 3 –D view of 82 bunches Block diagram of the fast readout electronics G. Ferioli, R. Jung - LHC-BI Review Workshop November 19&20

  9. Conclusion • Profile monitors already installed in the transfer line between the PS and SPS are currently used for the diagnostics of LHC type beams. • With the use of two screens (Al2O3(Cr) and titanium) a very large dynamic range in intensity > 105 can be achieved.  • A spatial resolution up to 40µm can be obtained with a simple mechanical and optical set-up. • The availability of 2-dimensional representations and a large number of points per projection are the major advantages of the BTV profile monitor. • Single bunch to bunch profile measurements can be made with the use of OTR screens observed by a Multi Anode Photomultiplier. • Question: are all foreseen screens to be kept? G. Ferioli, R. Jung - LHC-BI Review Workshop November 19&20

More Related