README Tracking study 2009.01.CDC_FDC_geom

1/18/2009  David Lawrence

This directory contains files relevant to a study of the CDC length and
correspondingly, FDC package positions done in Jan. 2009.

These studies turn off the Lorentz deflections, diffusion effects, and
angle effects for the FDC built-into the main trunk.

The following geometries will be studied:

geomC:
	CDC length 150cm

geomJ:
	CDC length 125cm

geomK:
	CDC length 100cm

geomL:
	CDC length 175cm


The following values must be changed in the XML in order to change the length of the CDC to Lcdc.
Note that this will keep the upstream end of the CDC fixed at L=17cm in the lab system. Also, it
is assumed that the FDC package spacing will be adjusted so that the downstream end stays fixed
at z=190.0+83.5+76+4.5+3 = 357cm in the lab frame.

The width spanned by the FDC packages will then be Lfdc = 357 - (Lcdc+40.0)

fdc1 = (Lfdc -2*(4.5+3))/2
fdc2 = fdc1/3

This does not change the cable positions or cooling meshes.


main_HDDS.xml:
----------------------

line 68: ForwardDC should have z value of 17+Lcdc+23


CentralDC_HDDS.xml:
----------------------

line 46: centralDC_option-1 should be Lcdc/2

line 48: CDBD should be Lcdc+1.5

line 49: CDGD should be Lcdc+10.5

line 67: CDPU should be -(Lcdc/2+0.45)
line 68: CDPD should be +(Lcdc/2+0.20)

line 82: CDPU should be -(Lcdc/2+0.45)
line 83: CDPD should be +(Lcdc/2+0.20)

line 95: CDPU should be -(Lcdc/2+0.45)
line 96: CDPD should be +(Lcdc/2+0.20)

line 143: CDPU should be -(Lcdc/2+0.45)
line 144: CDPD should be +(Lcdc/2+0.20)

line 156: CDPU should be -(Lcdc/2+0.45)
line 157: CDPD should be +(Lcdc/2+0.20)

line 169: CDPU should be -(Lcdc/2+0.45)
line 170: CDPD should be +(Lcdc/2+0.20)

line 221: CDPU should be -(Lcdc/2+0.45)
line 222: CDPD should be +(Lcdc/2+0.20)

line 236: CDPU should be -(Lcdc/2+0.45)
line 237: CDPD should be +(Lcdc/2+0.20)

line 249: CDPU should be -(Lcdc/2+0.45)
line 250: CDPD should be +(Lcdc/2+0.20)

line 258: UPLG should be -(Lcdc/2+0.5)
line 259: DPLG should be +(Lcdc/2+0.5)

line 264: UPLG should be -(Lcdc/2+0.92)
line 265: DPLG should be +(Lcdc/2+0.92)

line 270: UPLG should be -(Lcdc/2+0.92)
line 271: DPLG should be +(Lcdc/2+0.92)

line 302: CDC should have z-value of Lcdc+24.0
line 304: CDCI should have z-value of Lcdc+22.0
line 306: CDCO should have z-value of Lcdc+22.0

line 333: STRA should be Lcdc+2.0
line 335: STRW should be Lcdc
line 336: WIRE should be Lcdc+2.0

line 340: STLA should be Lcdc+2.84
line 342: STLB should be Lcdc+2.84

line 340: STLW should be Lcdc+0.83
line 342: STLX should be Lcdc+0.83

line 347: WILE should be Lcdc+2.83

line 349: DC1 should be Lcdc+2.5
line 350: DC3 should be Lcdc+2.5
line 351: DC5 should be Lcdc+2.5
line 353: DC13 should be Lcdc+2.5
line 354: DC15 should be Lcdc+2.5
line 355: DC17 should be Lcdc+2.5
line 357: DC25 should be Lcdc+2.5
line 358: DC27 should be Lcdc+2.5

line 361: DS1 should be Lcdc+2.5
line 363: DS2 should be Lcdc+2.5
line 365: DS3 should be Lcdc+2.5
line 367: DS8 should be Lcdc+2.5
line 369: DS9 should be Lcdc+2.5
line 371: DS10 should be Lcdc+2.5
line 373: DS11 should be Lcdc+2.5
line 375: DS12 should be Lcdc+2.5
line 377: DS17 should be Lcdc+2.5
line 379: DS18 should be Lcdc+2.5
line 381: DS19 should be Lcdc+2.5
line 383: DS20 should be Lcdc+2.5
line 385: DS21 should be Lcdc+2.5
line 387: DS22 should be Lcdc+2.5
line 389: DS23 should be Lcdc+2.5
line 391: DS24 should be Lcdc+2.5
line 393: DS25 should be Lcdc+2.5


ForwardDC_HDDS.xml:
----------------------

line 23: forward DC should be fdc1+4.5+3.0

line 31: forwardDC_package_1 should be -fdc1
line 34: forwardDC_package_2 should be -fdc2
line 37: forwardDC_package_3 should be +fdc2
line 40: forwardDC_package_4 should be +fdc1

line 242: FDC should be 2*(fdc1+4.5+3.0)+5

line 316: FDRL should be 2*(fdc1+4.5+3.0)+5