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Influence of OB LEDs on transmission length measurements (EXTENDED) HAROLD YEPES-RAMIREZ IFIC, October 26 nt 2011 1

Influence of OB LEDs on transmission length measurements (EXTENDED) HAROLD YEPES-RAMIREZ IFIC, October 26 nt 2011 1

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Page 1: Influence of OB LEDs on transmission length measurements (EXTENDED) HAROLD YEPES-RAMIREZ IFIC, October 26 nt 2011 1

Influence of OB LEDs on transmission length measurements

(EXTENDED)

HAROLD YEPES-RAMIREZ

IFIC, October 26nt 2011 1

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TARGET LINES: L6, L2, L3, L8, EMITTER LINE: L4

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BY FACES: FOR THE TARGET LINES COMMENTED

BEFORE (i.e: Face_x: L2, L3, L8, L6)

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ESTA ES FACE 6 OK?Errata en la leyenda

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BY LINES: FOR THE TARGET LINES COMMENTED

BEFORE (i.e: Line_x: face1, face2, face3, face4, face5, face6)

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SUMMARY: Transmission length values as a function of the target lines and OB faces

Target/Face Face 1 Face 2 Face 3 Face 4 Face 5 Face 6

L2 41.7±4.1 38.1±2.8 35.4±3.4 33.0±2.1 34.4±3.7 45.3±3.3

L3 55.3±6.7 46.5±3.0 45.1±2.3 52.6±3.4 38.9±3.5 42.9±2.4

L8 45.8±4.9 39.9±2.9 40.0±2.3 42.9±3.0 50.5±3.2 48.6±3.2

L6 46.5±4.3 36.8±3.2 48.4±4.6 44.2±3.8 44.7±4.2 47.8±3.2

TO-DO: Number of hits Vs Distance, in order to see which LED gives more direct photons (reduced shadowing effect). It will be the LED to perform the measurements and compatible with the CALIBOB results?

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NUMBER OF HITS ONLY(i.e: Face_x: L2,

L3, L8, L6)

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NUMBER OF HITS ONLY (i.e: Line_x:

face1, face2, face3, face4, face5, face6)

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It “looks” as the light output is as follow:

Face 1

• Cara 1 da mas luz en L2 (frente) y menos en línea opuesta L8.• Cara 2 sigue dando mas luz en L2 y menos en la opuesta L6.• Cara 3 da mas luz en L8 y menos en opuesta L2.• Cara 4 da mas luz en L8 y menos en opuesta L2.• Cara 5 da mas luz en L6 y menos en opuesta L3.• Cara 6 da mas luz en L2,L6 (contiguas) y menos en opuestas L3,L8 contiguas.

Face 2

Face 3

Face 4

Face 5

Face 6

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OTRAS LINEAS: L2 (CON MUCHA ESTADISTICA 1M EVENTOS)

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¿¿¿¿¿¿¿¿

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• Mucha mas luz en la L1, se mide una L mayor (a pesar de ese extraño salto en torno a 200 m y el error tan grande, que habrá que revisar) que en la L4 como se viene haciendo tradicionalmente (por eso nuestra falsa idea de que L este en torno a 45 m).• Parece pertinente para las medidas que se estén haciendo, un corte en función de la línea que tenga mas en frente el LED que se esta usando en el momento.• No hay datos en la L6 ya que para esa época la L6 no estaba conectada y es una de las adyacentes mas cercanas.• El run usado (44552) es el de mas estadística (1M eventos)

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OTRAS LINEAS: L1 (CON MUCHA ESTADISTICA 1M EVENTOS)

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• Mucha mas luz en la L5, sin embargo no es la de pendiente mayor (?), a lo mejor cuestiones asociadas al fit? Se que debo volver a revisar el corte automático para definir el rango del ajuste.• Se mide prácticamente la misma cantidad de luz en la L2 y L3, a pesar de que la L2 se encuentra mucho mas lejos de L1 que la L3 (casi al frente).• El run usado (53802) es el de mas estadística (380k eventos)

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POR HACER: LASER, ALL TOP

LEDs Y FULL-BEACON

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