H9

H9 channel assignments

The 32 H9 channels are assigned as follows:

bottom 16 paddles: channels 101 through 116
top 16 paddles:    channels 201 through 216
      

Within each group the channel numbers increase with the positive-X direction. Channel X01 is farthest from the MPS control room, channel X16 is closest to the MPS control room.

H9 ADC and TDC channel assignments

TDC Channel	ADC Channel	Paddle name	Software Channel
64	32	1B	101
65	33	1T	201
66	34	2B	102
67	35	2T	202
68	36	3B	103
69	37	3T	203
70	38	4B	104
71	39	4T	204
72	40	5B	105
73	41	5T	205
74	42	6B	106
75	43	6T	206
76	44	7B	107
77	45	7T	207
78	46	8B	108
79	47	8T	208
80	48	9B	109
81	49	9T	209
82	50	10B	110
83	51	10T	210
84	52	11B	111
85	53	11T	211
86	54	12B	112
87	55	12T	212
88	56	13B	113
89	57	13T	213
90	58	14B	114
91	59	14T	214
92	60	15B	115
93	61	15T	215
94	62	16B	116
95	63	16T	216

H9 data groups

The following groups are used to store H9 information:

GROUP_H9_ADCS  --- H9 ADC information (if H9 signals go to ADCs)
GROUP_H9_TDCS  --- H9 TDC information
GROUP_H9_HITS  --- H9 hits information, combined from the ADCs and TDCs,
                   including ADC threshold cuts and TDC time window
                   cuts. In this group hits do not repeat and are stored
                   in the order of increazing channel numbers.
GROUP_H9_MC_HITS - H9 hits generated by MonteCarlo
      

H9 parameters stored in the Map

The H9 ADC thresholds (if ADCs are used) and TDC time window parameters are stored in the Map file vetoes.Map, subsystem h9, items adc_min, tdc_min and tdc_max

H9 geometry package

The H9 geometry packagedefinitions are stored in the C header file h9geom.h

Following definitions are available:

• data type h9geom_t - defines the H9 geometry
• external variable h9geom - a convinient place to hold the H9 geometry.
• function h9_loadGeom - to load the H9 geometry for a given run.
• function h9_getGeom - get the MPS coordinates of a paddle, given a channel number.
• function TrackToH9 - track a particle to H9, similar to TrackToZ, except that it takes into account the strange form of H9.
• function h9_pointToChannel - find the channel number of the H9 paddle corresponding to the MPS coordinates of a given point, normally returned by TrackToH9.

Last modified: Mon Feb 10 19:38:13 EST